Yes Advantage is considering that the attack with Vex Mastery hit. It's true that it's not repeatable in the exact same way, but you could still attack with all 4 weapons next round where you start wielding warhammer for example;
1. Move 10 feet towards goblin, take the Attack action, equip shortsword and attack with shortsword. [Action Action#1][10Movement]
2. Unequip shortsword and attack with warhammer with Advantage using both hands, knocking the goblin back ten feet.[DualWielder][BonusAction][Versatile][Vex][Push]
3. Move 10 feet towards goblin, unequip warhammer, equip rapier & scimitar, and attack with rapier. [10Movement][Free Object Interaction][DualWielder:QuickDraw][Action Action#2]
4. Attack with scimitar with Advantage. [DualWielder:QuickDraw][LightWeapon][Nick][Vex]
2. Unequip shortsword and attack with warhammer with Advantage using both hands, knocking the goblin back ten feet.[DualWielder][BonusAction][Versatile][Vex][Push] [...]
Sorry again if I'm missing something, but I'd like to ask one more time to understand the examples myself: Is the Bonus Action used to unequip the shortsword?
2. Unequip shortsword and attack with warhammer with Advantage using both hands, knocking the goblin back ten feet.[DualWielder][BonusAction][Versatile][Vex][Push] [...]
Sorry again if I'm missing something, but I'd like to ask one more time to understand the examples myself: Is the Bonus Action used to unequip the shortsword?
Good catch again! I think DerManiac is right from there it's probably not repeatable then.
2. Unequip shortsword and attack with warhammer with Advantage using both hands, knocking the goblin back ten feet.[DualWielder][BonusAction][Versatile][Vex][Push] [...]
Sorry again if I'm missing something, but I'd like to ask one more time to understand the examples myself: Is the Bonus Action used to unequip the shortsword?
Good catch again! I think DerManiac is right from there it's probably not repeatable then.
Main action attack, nick mastery attack, then any other extra attacks you have from other features like level 5 extra attack or gloom stalker's dread ambusher feature. Then bonus action is still available for the light weapon attack.
As for light property it uses your bonus action and needs to be a different weapon than the main light weapon. So the 2 Daggers example would work on my table so long as they are different weapons not the exact same Dagger.
Main action attack, nick mastery attack, then any other extra attacks you have from other features like level 5 extra attack or gloom stalker's dread ambusher feature. Then bonus action is still available for the light weapon attack.
As for light property it uses your bonus action and needs to be a different weapon than the main light weapon. So the 2 Daggers example would work on my table so long as they are different weapons not the exact same Dagger.
If you have used the light weapon attack with Nick, you can't also take it as a bonus action, because Nick says you can't take the extra attack of the light action more than once a turn.
Light Property: Extra attack of the Light property as a Bonus Action with different Light weapon can't add positive ability modifier to the damage. Nick Mastery: Extra attack of the Light property become part of Attack action instead of Bonus Action (1/turn). Dual Wielder Feat: Extra attack of the Dual Wielder feat as a Bonus Action with different non-Two-Handed melee weapon, can't add positive ability modifier to the damage. Two Weapon Fighting Style: Can now add ability modifier to the extra attack's damage of the Light property or Dual Wielder feat.
I consider the "one extra attack" of the Light Property and the "one extra attack" of the Dual Wielder Feat as cumulative, regardless of whether the Nick Property is involved or not, because there is nothing in the rules that state that these extra attacks are mutually exclusive or require the Nick Property to be involved. And otherwise, Dual Wielder would just provide a d8 instead of a d6. You just can't equip/unequip weapons during those attacks because that only works for attacks that are made as part of the attack action.
But you could make a hard stance on the wording of Bonus Action ("You can take only one Bonus Action on your turn, so you must choose which Bonus Action to use if you have more than one available.") and say that you can either take the Bonus Action attack from the Light property or the Bonus Action attack from Dual Wielder, but not both, in which case you'd have to use the Nick property to get both. The number of attacks would be the same either way and you can still dual-wield a scimitar and a short sword.
By the way, I have been trying to find out whether the Nick property weapon has to be the main hand weapon or the offhand weapon and it appears that everyone is saying something different. The wording isn't entirely clear either, but I lean towards offhand as it says "When you make the extra attack of the Light property, you can make it as part of the Attack action instead of as a Bonus Action", suggesting that it has to be the weapon with which the extra attack of the Light property is made. What are the opinions on that here?
Light Property: Extra attack of the Light property as a Bonus Action with different Light weapon can't add positive ability modifier to the damage. Nick Mastery: Extra attack of the Light property become part of Attack action instead of Bonus Action (1/turn). Dual Wielder Feat: Extra attack of the Dual Wielder feat as a Bonus Action with different non-Two-Handed melee weapon, can't add positive ability modifier to the damage. Two Weapon Fighting Style: Can now add ability modifier to the extra attack's damage of the Light property or Dual Wielder feat.
I consider the "one extra attack" of the Light Property and the "one extra attack" of the Dual Wielder Feat as cumulative, regardless of whether the Nick Property is involved or not, because there is nothing in the rules that state that these extra attacks are mutually exclusive or require the Nick Property to be involved. And otherwise, Dual Wielder would just provide a d8 instead of a d6. You just can't equip/unequip weapons during those attacks because that only works for attacks that are made as part of the attack action.
But you could make a hard stance on the wording of Bonus Action ("You can take only one Bonus Action on your turn, so you must choose which Bonus Action to use if you have more than one available.") and say that you can either take the Bonus Action attack from the Light property or the Bonus Action attack from Dual Wielder, but not both, in which case you'd have to use the Nick property to get both. The number of attacks would be the same either way and you can still dual-wield a scimitar and a short sword.
That's the way bonus actions work. You have two separate abilities each giving you a bonus action. You must choose. You don't get to combine them just because they're very similar. If there were a specific rule saying you could that'd be different, but there isn't.
If you had a weapon of speed, you wouldn't get to merge that one in, either.
By the way, I have been trying to find out whether the Nick property weapon has to be the main hand weapon or the offhand weapon and it appears that everyone is saying something different. The wording isn't entirely clear either, but I lean towards offhand as it says "When you make the extra attack of the Light property, you can make it as part of the Attack action instead of as a Bonus Action", suggesting that it has to be the weapon with which the extra attack of the Light property is made. What are the opinions on that here?
There is no RAW answer, so ultimately it's "ask your DM".
My interpretation is it has to be the one you make the Nick attack with, because that's the most consistent with the other masteries.
But you can also make an argument for the Nick weapon has to be the one that triggers the additional attack, and I can't say you're wrong.
There's even a case that can be made that you must be wielding the Nick weapon at the time the additional attack is made, but it doesn't have to have been used to attack. That argument is thinner than the other two.
That's the way bonus actions work. You have two separate abilities each giving you a bonus action. You must choose. You don't get to combine them just because they're very similar. If there were a specific rule saying you could that'd be different, but there isn't.
If you had a weapon of speed, you wouldn't get to merge that one in, either.
I guess we'll just have to wait and see if/when WotC clarifies this like they did with the Shadowblade-Booming Blade situation before. I see your point regarding this as two separate bonus actions between which one has to choose based on the wording of the rules about Bonus Actions. Personally, I see it differently as they are just attacks, not entire actions. And from a logic or immersion standpoint, it makes a lot more sense than the Weapon-Juggling or the Dual-Wielding-Daggers-Throwing-with-Shield concepts that are otherwise discussed just because it lacks a phrase like "you are holding" which somewhat reminds of the 2014 rules on Grappling. But I also see a difference in the wording "as a bonus action" and "as part of the bonus action", so I understand that the most common interpretation as of now differs from mine. And you bring up an interesting point concerning weapons of speed which also has implications that WotC can rule on.
There is no RAW answer, so ultimately it's "ask your DM".
My interpretation is it has to be the one you make the Nick attack with, because that's the most consistent with the other masteries.
But you can also make an argument for the Nick weapon has to be the one that triggers the additional attack, and I can't say you're wrong.
I agree with your interpretation based on the wording of the Nick property rule because it says "When you make the extra attack of the Light property...", not (like the other Weapon Masteries are phrased) "If you hit/attack a creature with this weapon, you can make the extra attack of the Light property as part of the attack action instead of as a Bonus Action." The only real argument for the other interpretation would be that something would have to move the extra attack to the attack action before the extra attack is executed, but that would be inconsistent with the wording as you already said.
You see, in my group of friends, we're all DMs on a rotating basis, so I guess we just have to come to a common understanding to have consistency and not change from campaign to campaign and DM to DM. And while we're at it, we can also decide on how we want to handle the previously mentioned situation. Ultimately, everyone decides on the rules at their tables regardless. I'm fairly certain we'd only disallow the Weapon-Juggling and Dual-Wielding-with-Shield.
This is problematic when considering a Monks actual bonus ability is a bonus attack, and if wielding daggers as their monk weapon they would be hitting 3 times per turn on a normal attack and 4 times a turn on flurry of blows. To follow it as explained in this thread would render the monks class feature useless. So if the purpose of this ability is to "free up your bonus action" then it would benefit monks the most. Other classes would need feats to do the same.
This is problematic when considering a Monks actual bonus ability is a bonus attack, and if wielding daggers as their monk weapon they would be hitting 3 times per turn on a normal attack and 4 times a turn on flurry of blows. To follow it as explained in this thread would render the monks class feature useless. So if the purpose of this ability is to "free up your bonus action" then it would benefit monks the most. Other classes would need feats to do the same.
It won’t stack with a Monk, because they have to choose to use a FP to trigger FOB. This would be their BA for their turn. Or they can choose to make an unarmed strike, or the bonus attack from the feat.
The feat was added for classes that didn’t provide an option for a bonus attack during BA (example rogue). BA actions are not stackable. You choose 1 of the BA actions. so a rogue can use cunning action or the bonus attack as per the feat, but not both. Same would apply to any class that gives you a BA ability and combined with a feat opportunity.
But like mentioned, opinions are what the table considers it to be the rule. When things are grey areas and vague it’s open to interpretation. Some rules are straightforward and not open for interpretation.
Going off this, if a fighter where to Action Surge, gain an attack action, then use that to attack with the light weapon again, would you gain the ability to attack as a bonus action with a different light weapon.
Attack->Nick Attack->Action Surge Attack->Bonus Action from Light Attack
Then how does this work with the Extra Attack feature Fighters have?
And what if I change the weapon I have to cycle through three weapons with the light property?
Going off this, if a fighter where to Action Surge, gain an attack action, then use that to attack with the light weapon again, would you gain the ability to attack as a bonus action with a different light weapon.
Attack->Nick Attack->Action Surge Attack->Bonus Action from Light Attack
If you use Nick, you can only make the Light property's extra attack once per turn. You'd need the Dual Wielder feat to use the Bonus Action that Nick freed up.
Then how does this work with the Extra Attack feature Fighters have?
With this feature, you could attack with the Light weapon ore more time (but not through your Bonus Action).
And what if I change the weapon I have to cycle through three weapons with the light property?
Same as before: Nick doesn't provide a new extra attack; it shifts the extra attack of the Light property from a Bonus Action to an extra attack and adds a restriction to it: "You can make this extra attack only once per turn".
Going off this, if a fighter where to Action Surge, gain an attack action, then use that to attack with the light weapon again, would you gain the ability to attack as a bonus action with a different light weapon.
Attack->Nick Attack->Action Surge Attack->Bonus Action from Light Attack
Then how does this work with the Extra Attack feature Fighters have?
And what if I change the weapon I have to cycle through three weapons with the light property?
“Attack->Nick Attack->Action Surge Attack->Bonus Action from Light Attack”
From my perspective, This would be correct without needing to have anything else, Why,
Your turn: Attack action- attack with a Nick weapon (let’s say dagger) That triggers Nick weapon master, which would move the light property (bonus action attack) to the Attack Action. Hence freeing up your Bonus Action. Now you trigger action surge, providing another Attack Action, you use another light weapon, triggering the property of Bonus Action Attack, because it’s still unused Bonus Action, you can now make that attack as a BA.
The only caveat which we at our table are not allowing is weapon juggling with a shield. But that’s our rule because we feel it’s overloaded with the bonus to AC (etc). But we can throw a weapon (nick) freeing up a hand and drawing out another weapon. That’s the only way with a shield. Not even dropping the weapon works for our rule.
In D&D 5e 2024, the "Nick" weapon mastery property ; it instead replaces the bonus action attack, allowing you to make that extra attack as part of your main action, but only once per turn.
Here's a breakdown:
Light Property:
When you take the Attack action and attack with a light melee weapon, you can use a bonus action to attack with a different light melee weapon.
Nick Property:
When you make the extra attack of the Light property, you can make it as part of the attack action instead of as a bonus action. You can make this extra attack only once per turn.
No Extra Attacks:
The Nick property doesn't grant a new extra attack; it simply shifts the extra attack granted by the Light property from a bonus action to being part of the main attack action.
Dual Wielder Feat:
The Dual Wielder feat allows you to make an extra attack as a bonus action when you attack with a different light weapon than you used for your first attack, which is separate from the Nick property.
Summary:
With Nick, you can make the extra Light weapon attack as part of your main action instead of as a bonus action, but you can only do this once per turn. You cannot make an additional bonus action attack with Dual Wielder after using Nick.
With Nick, you can make the extra Light weapon attack as part of your main action instead of as a bonus action, but you can only do this once per turn. You cannot make an additional bonus action attack with Dual Wielder after using Nick.
To my understanding from the rules and apparently confirmed by Devs, Nick doesn't give any extra attack, all it does it modify the extra attack of the Light property by shifting it into the Attack action instead of Bonus Action, and limit it to 1/turn. This frees your Bonus Action to do something else with it. But not the extra attack of the Light property because you already did it this turn. The extra attack of Dual Wieder is a different Bonus Action though, and thus still available.
The best way to illustrate the distinction between the extra attack of the Light property and the extra attack of the Dual Wielder feat is with how Bonus Action works as you can take only one Bonus Action on your turn, so you must choose which Bonus Action to use if you have more than one available but you otherwise don’t have a Bonus Action to take.
Barring any other abilities, as a Dual Wielder start your turn, you don't have a Bonus Action to take. When you take the Attack action on your turn and attack with a Light weapon, now:
- you can make one extra attack as a Bonus Action later on the same turn with a different Light weapon. [ Light property]
- you can make one extra attack as a Bonus Action later on the same turn with a different Melee weapon that lacks the Two-Handed property. [Dual Wielder]
With Nick Mastery, when you make the extra attack of the Light property as part of the Attack action instead of as a Bonus Action, your Bonus Action is still available.
In D&D 5e 2024, the "Nick" weapon mastery property ; it instead replaces the bonus action attack, allowing you to make that extra attack as part of your main action, but only once per turn.
Here's a breakdown:
Light Property:
When you take the Attack action and attack with a light melee weapon, you can use a bonus action to attack with a different light melee weapon.
Nick Property:
When you make the extra attack of the Light property, you can make it as part of the attack action instead of as a bonus action. You can make this extra attack only once per turn.
No Extra Attacks:
The Nick property doesn't grant a new extra attack; it simply shifts the extra attack granted by the Light property from a bonus action to being part of the main attack action.
Dual Wielder Feat:
The Dual Wielder feat allows you to make an extra attack as a bonus action when you attack with a different light weapon than you used for your first attack, which is separate from the Nick property.
Summary:
With Nick, you can make the extra Light weapon attack as part of your main action instead of as a bonus action, but you can only do this once per turn. You cannot make an additional bonus action attack with Dual Wielder after using Nick.
You're fine until you get to DW.
The Dual Wielder feat is separate both from Nick and from the Light property's extra attack.
Enhanced Dual Wielding. When you take the Attack action on your turn and attack with a weapon that has the Light property, you can make one extra attack as a Bonus Action later on the same turn with a different weapon, which must be...
It's triggered by attacking with a weapon that has the Light property. It is not the extra attack of the Light property, but the extra attack of the Dual Wielder feat.
When you make your first attack of the round with a Light weapon, both the Light property and the DW feat are activated. Each grants you a bonus action attack with slightly different conditions.
Normally, you can't use both, because you only have one bonus action.
However, Nick modifies the extra attack of the Light property to not use a bonus action, so you have your bonus action free for the DW attack.
Yes, Nick limits you to once per turn, but that is explicitly a limit placed on "the extra attack of the Light property". That only stops you from trying to use the Light attack more than once, with or without Nick. (So, for instance, if a Fighter Action Surges and takes a second attack action, they don't get any extra attacks from the Light property this time round.)
But, even if you have only one attack per round by default, Light, Nick, and DW gets you three.
Nick specifically states that you still can't make the extra attack via the Light property more than once a turn.
The Dual Wielder feature makes an extra attack via the Light property.
These two extra attacks cannot stack with each other because you are strictly prohibited from making more than one extra attack via the Light property and Dual Wielder does not change this; it simply allows you to make the extra attack with a non-light weapon.
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Yes Advantage is considering that the attack with Vex Mastery hit. It's true that it's not repeatable in the exact same way, but you could still attack with all 4 weapons next round where you start wielding warhammer for example;
1. Move 10 feet towards goblin, take the Attack action, equip shortsword and attack with shortsword. [Action Action#1][10Movement]
2. Unequip shortsword and attack with warhammer with Advantage using both hands, knocking the goblin back ten feet.[DualWielder][BonusAction][Versatile][Vex][Push]
3. Move 10 feet towards goblin, unequip warhammer, equip rapier & scimitar, and attack with rapier. [10Movement][Free Object Interaction][DualWielder:QuickDraw][Action Action#2]
4. Attack with scimitar with Advantage. [DualWielder:QuickDraw][LightWeapon][Nick][Vex]
Sorry again if I'm missing something, but I'd like to ask one more time to understand the examples myself: Is the Bonus Action used to unequip the shortsword?
Good catch again! I think DerManiac is right from there it's probably not repeatable then.
It's always an honor to learn from you!
The way I read that is
Main action attack, nick mastery attack, then any other extra attacks you have from other features like level 5 extra attack or gloom stalker's dread ambusher feature. Then bonus action is still available for the light weapon attack.
As for light property it uses your bonus action and needs to be a different weapon than the main light weapon. So the 2 Daggers example would work on my table so long as they are different weapons not the exact same Dagger.
If you have used the light weapon attack with Nick, you can't also take it as a bonus action, because Nick says you can't take the extra attack of the light action more than once a turn.
Shouldn't Jeremy Crawford be reading this? lol.
I consider the "one extra attack" of the Light Property and the "one extra attack" of the Dual Wielder Feat as cumulative, regardless of whether the Nick Property is involved or not, because there is nothing in the rules that state that these extra attacks are mutually exclusive or require the Nick Property to be involved. And otherwise, Dual Wielder would just provide a d8 instead of a d6. You just can't equip/unequip weapons during those attacks because that only works for attacks that are made as part of the attack action.
But you could make a hard stance on the wording of Bonus Action ("You can take only one Bonus Action on your turn, so you must choose which Bonus Action to use if you have more than one available.") and say that you can either take the Bonus Action attack from the Light property or the Bonus Action attack from Dual Wielder, but not both, in which case you'd have to use the Nick property to get both. The number of attacks would be the same either way and you can still dual-wield a scimitar and a short sword.
By the way, I have been trying to find out whether the Nick property weapon has to be the main hand weapon or the offhand weapon and it appears that everyone is saying something different. The wording isn't entirely clear either, but I lean towards offhand as it says "When you make the extra attack of the Light property, you can make it as part of the Attack action instead of as a Bonus Action", suggesting that it has to be the weapon with which the extra attack of the Light property is made. What are the opinions on that here?
That's the way bonus actions work. You have two separate abilities each giving you a bonus action. You must choose. You don't get to combine them just because they're very similar. If there were a specific rule saying you could that'd be different, but there isn't.
If you had a weapon of speed, you wouldn't get to merge that one in, either.
There is no RAW answer, so ultimately it's "ask your DM".
My interpretation is it has to be the one you make the Nick attack with, because that's the most consistent with the other masteries.
But you can also make an argument for the Nick weapon has to be the one that triggers the additional attack, and I can't say you're wrong.
There's even a case that can be made that you must be wielding the Nick weapon at the time the additional attack is made, but it doesn't have to have been used to attack. That argument is thinner than the other two.
I guess we'll just have to wait and see if/when WotC clarifies this like they did with the Shadowblade-Booming Blade situation before. I see your point regarding this as two separate bonus actions between which one has to choose based on the wording of the rules about Bonus Actions. Personally, I see it differently as they are just attacks, not entire actions. And from a logic or immersion standpoint, it makes a lot more sense than the Weapon-Juggling or the Dual-Wielding-Daggers-Throwing-with-Shield concepts that are otherwise discussed just because it lacks a phrase like "you are holding" which somewhat reminds of the 2014 rules on Grappling. But I also see a difference in the wording "as a bonus action" and "as part of the bonus action", so I understand that the most common interpretation as of now differs from mine. And you bring up an interesting point concerning weapons of speed which also has implications that WotC can rule on.
I agree with your interpretation based on the wording of the Nick property rule because it says "When you make the extra attack of the Light property...", not (like the other Weapon Masteries are phrased) "If you hit/attack a creature with this weapon, you can make the extra attack of the Light property as part of the attack action instead of as a Bonus Action." The only real argument for the other interpretation would be that something would have to move the extra attack to the attack action before the extra attack is executed, but that would be inconsistent with the wording as you already said.
You see, in my group of friends, we're all DMs on a rotating basis, so I guess we just have to come to a common understanding to have consistency and not change from campaign to campaign and DM to DM. And while we're at it, we can also decide on how we want to handle the previously mentioned situation. Ultimately, everyone decides on the rules at their tables regardless. I'm fairly certain we'd only disallow the Weapon-Juggling and Dual-Wielding-with-Shield.
This is problematic when considering a Monks actual bonus ability is a bonus attack, and if wielding daggers as their monk weapon they would be hitting 3 times per turn on a normal attack and 4 times a turn on flurry of blows. To follow it as explained in this thread would render the monks class feature useless. So if the purpose of this ability is to "free up your bonus action" then it would benefit monks the most. Other classes would need feats to do the same.
It won’t stack with a Monk, because they have to choose to use a FP to trigger FOB. This would be their BA for their turn. Or they can choose to make an unarmed strike, or the bonus attack from the feat.
The feat was added for classes that didn’t provide an option for a bonus attack during BA (example rogue). BA actions are not stackable. You choose 1 of the BA actions.
so a rogue can use cunning action or the bonus attack as per the feat, but not both. Same would apply to any class that gives you a BA ability and combined with a feat opportunity.
But like mentioned, opinions are what the table considers it to be the rule. When things are grey areas and vague it’s open to interpretation. Some rules are straightforward and not open for interpretation.
Going off this, if a fighter where to Action Surge, gain an attack action, then use that to attack with the light weapon again, would you gain the ability to attack as a bonus action with a different light weapon.
Attack->Nick Attack->Action Surge Attack->Bonus Action from Light Attack
Then how does this work with the Extra Attack feature Fighters have?
And what if I change the weapon I have to cycle through three weapons with the light property?
If you use Nick, you can only make the Light property's extra attack once per turn. You'd need the Dual Wielder feat to use the Bonus Action that Nick freed up.
With this feature, you could attack with the Light weapon ore more time (but not through your Bonus Action).
Same as before: Nick doesn't provide a new extra attack; it shifts the extra attack of the Light property from a Bonus Action to an extra attack and adds a restriction to it: "You can make this extra attack only once per turn".
“Attack->Nick Attack->Action Surge Attack->Bonus Action from Light Attack”
From my perspective, This would be correct without needing to have anything else, Why,
Your turn: Attack action- attack with a Nick weapon (let’s say dagger) That triggers Nick weapon master, which would move the light property (bonus action attack) to the Attack Action. Hence freeing up your Bonus Action. Now you trigger action surge, providing another Attack Action, you use another light weapon, triggering the property of Bonus Action Attack, because it’s still unused Bonus Action, you can now make that attack as a BA.
The only caveat which we at our table are not allowing is weapon juggling with a shield. But that’s our rule because we feel it’s overloaded with the bonus to AC (etc). But we can throw a weapon (nick) freeing up a hand and drawing out another weapon. That’s the only way with a shield. Not even dropping the weapon works for our rule.
When using Action Surge you're still on the same turn you made the extra attack of the Light property and thus the limit still apply.
To my understanding from the rules and apparently confirmed by Devs, Nick doesn't give any extra attack, all it does it modify the extra attack of the Light property by shifting it into the Attack action instead of Bonus Action, and limit it to 1/turn. This frees your Bonus Action to do something else with it. But not the extra attack of the Light property because you already did it this turn. The extra attack of Dual Wieder is a different Bonus Action though, and thus still available.
The best way to illustrate the distinction between the extra attack of the Light property and the extra attack of the Dual Wielder feat is with how Bonus Action works as you can take only one Bonus Action on your turn, so you must choose which Bonus Action to use if you have more than one available but you otherwise don’t have a Bonus Action to take.
Barring any other abilities, as a Dual Wielder start your turn, you don't have a Bonus Action to take. When you take the Attack action on your turn and attack with a Light weapon, now:
- you can make one extra attack as a Bonus Action later on the same turn with a different Light weapon. [ Light property]
- you can make one extra attack as a Bonus Action later on the same turn with a different Melee weapon that lacks the Two-Handed property. [Dual Wielder]
With Nick Mastery, when you make the extra attack of the Light property as part of the Attack action instead of as a Bonus Action, your Bonus Action is still available.
You're fine until you get to DW.
The Dual Wielder feat is separate both from Nick and from the Light property's extra attack.
It's triggered by attacking with a weapon that has the Light property. It is not the extra attack of the Light property, but the extra attack of the Dual Wielder feat.
When you make your first attack of the round with a Light weapon, both the Light property and the DW feat are activated. Each grants you a bonus action attack with slightly different conditions.
Normally, you can't use both, because you only have one bonus action.
However, Nick modifies the extra attack of the Light property to not use a bonus action, so you have your bonus action free for the DW attack.
Yes, Nick limits you to once per turn, but that is explicitly a limit placed on "the extra attack of the Light property". That only stops you from trying to use the Light attack more than once, with or without Nick. (So, for instance, if a Fighter Action Surges and takes a second attack action, they don't get any extra attacks from the Light property this time round.)
But, even if you have only one attack per round by default, Light, Nick, and DW gets you three.
Nick specifically states that you still can't make the extra attack via the Light property more than once a turn.
The Dual Wielder feature makes an extra attack via the Light property.
These two extra attacks cannot stack with each other because you are strictly prohibited from making more than one extra attack via the Light property and Dual Wielder does not change this; it simply allows you to make the extra attack with a non-light weapon.