Not sure why you listed the potion of giant size twice. However, if a bugbear wielding a reach weapon drank that potion and used lunging attack on their own turn, then their reach would be 25 feet for that one attack, 20 feet for any non-lunging attacks they make on their turn, 20 feet for any lunging attacks they make as a reaction, and 15 feet for any other reaction attacks they make.
You can only benefit from one Potion of Giant Size, as magical effects caused by the same spell/item don't stack.
But yeah, you can stack Bugbear (+5 reach), Potion of Giant Size (+5 reach), and Lunging Attack (+5 reach for that attack). You can then add on either 4-Element Monk Fangs of the Fire Snake (+10 reach to unarmed attacks that turn) or a Reach weapon (+5 reach on attacks with the weapon).
There's also the Rune Knight Fighter's Runic Juggernaut feature, which lets you be Huge and increases your reach by 5 feet when you are that size!
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The reason the potion is listed twice is that the OP is under the mistaken impression that increasing your size increases your reach.
While it doesn't increase your reach, it does increase the distance from the center of your character to the edge of their range. It does this by increasing the area you occupy, so instead of a 5 foot square, you occupy a 15 foot square.
The reason the potion is listed twice is that the OP is under the mistaken impression that increasing your size increases your reach.
While it doesn't increase your reach, it does increase the distance from the center of your character to the edge of their range. It does this by increasing the area you occupy, so instead of a 5 foot square, you occupy a 15 foot square.
The reason the potion is listed twice is that the OP is under the mistaken impression that increasing your size increases your reach.
While it doesn't increase your reach, it does increase the distance from the center of your character to the edge of their range. It does this by increasing the area you occupy, so instead of a 5 foot square, you occupy a 15 foot square.
But the Potion of Giant Size does specifically increase your reach by 5 feet in addition to making the character Huge (occupying a 15 ft x 15 ft square area.)
Though we can't be sure why the OP listed the potion twice until they tell us why, I interpreted it as them thinking that you could drink 2 of the potion to stack up the +5 reach effect, even if it wouldn't make you larger than Huge.
Edit: Oh wait, I see what you mean now on further reread. Yeah, they seem to think that just becoming Huge automatically gives you greater reach. You are most likely correct in your interpretation, while I am not.
In general, you're looking for "increase by," not "increase to." All the things you listed can stack (automatic size-based reach adjustment notwithstanding). The only thing I can think of that doesn't, is the Eldritch Claw Tattoo, which allows you to strike targets 15ft away but doesn't actually seem to modify your reach.
As an aside, I hate the Potion of Giant Size. It's supposed to be a big story beat in an adventure, but instead it's just listed as a magic item and everybody treats it like it's normal gear that you can buy. Though in that adventure I'd argue it's not even particularly a big deal -- it comes in too late to be genuinely useful, and there's no buildup to it or anything. Dumb, dumb, dumb.
Rules technicalities aside, it would be realistic for features that expand your attack reach to stack. It just kind of makes sense.
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The highest I’ve calculated is 55 feet, 60 with an optional rule.
Eldritch Claw Tattoo: 15ft base (Eldritch Maul) instead of 5ft
Living Shadow (Dark Gift): +10ft (Shadow Strike)
Fangs of the Fire Snake: +10ft (Way of the Four Element Monk)
Bugbear: +5ft
Potion of Giant Size: +5ft*
Lunging Maneuver: +5ft. (Battlemaster Fighter)
Avernus’ demon ichor coated weapon or fist: +5ft
that leads to 55ft
*With the miscability optional for potion, it could have the potential to double its effect, bringing the grand total to 60ft. Though this is based on something unpredictable and possibly not used at your table. Similar with Dark Gifts which are setting specific. Demon ichor would require you to come across it, same with the Eldritch Claw Tattoo and the potion. The rest is fairly attainable and build only (requires less input from the DM—which is still a reasonable 25ft.)
you can also replace Monk for Juggernaught Barbarian with a Glaive (each giving a +5ft) for the same result.
The highest I’ve calculated is 55 feet, 60 with an optional rule.
Eldritch Claw Tattoo: 15ft base (Eldritch Maul) instead of 5ft
Living Shadow (Dark Gift): +10ft (Shadow Strike)
Fangs of the Fire Snake: +10ft (Way of the Four Element Monk)
Bugbear: +5ft
Potion of Giant Size: +5ft*
Lunging Maneuver: +5ft. (Battlemaster Fighter)
Avernus’ demon ichor coated weapon or fist: +5ft
that leads to 55ft
*With the miscability optional for potion, it could have the potential to double its effect, bringing the grand total to 60ft. Though this is based on something unpredictable and possibly not used at your table. Similar with Dark Gifts which are setting specific. Demon ichor would require you to come across it, same with the Eldritch Claw Tattoo and the potion. The rest is fairly attainable and build only (requires less input from the DM—which is still a reasonable 25ft.)
you can also replace Monk for Juggernaught Barbarian with a Glaive (each giving a +5ft) for the same result.
That checks out. All of these either increase the reach of all melee attacks or any melee weapon attack, with the only exception being fangs of the fire snake specifying unarmed strikes.
As path of the juggernaut has not been officially printed, I wouldn't count it as a replacement for 4 elements monk.
How much of these stacks:
Not sure why you listed the potion of giant size twice. However, if a bugbear wielding a reach weapon drank that potion and used lunging attack on their own turn, then their reach would be 25 feet for that one attack, 20 feet for any non-lunging attacks they make on their turn, 20 feet for any lunging attacks they make as a reaction, and 15 feet for any other reaction attacks they make.
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You can only benefit from one Potion of Giant Size, as magical effects caused by the same spell/item don't stack.
But yeah, you can stack Bugbear (+5 reach), Potion of Giant Size (+5 reach), and Lunging Attack (+5 reach for that attack). You can then add on either 4-Element Monk Fangs of the Fire Snake (+10 reach to unarmed attacks that turn) or a Reach weapon (+5 reach on attacks with the weapon).
There's also the Rune Knight Fighter's Runic Juggernaut feature, which lets you be Huge and increases your reach by 5 feet when you are that size!
Helpful rewriter of Japanese->English translation and delver into software codebases (she/e/they)
The reason the potion is listed twice is that the OP is under the mistaken impression that increasing your size increases your reach.
While it doesn't increase your reach, it does increase the distance from the center of your character to the edge of their range. It does this by increasing the area you occupy, so instead of a 5 foot square, you occupy a 15 foot square.
Ahh, that makes sense.
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But the Potion of Giant Size does specifically increase your reach by 5 feet in addition to making the character Huge (occupying a 15 ft x 15 ft square area.)
Though we can't be sure why the OP listed the potion twice until they tell us why, I interpreted it as them thinking that you could drink 2 of the potion to stack up the +5 reach effect, even if it wouldn't make you larger than Huge.
Edit: Oh wait, I see what you mean now on further reread. Yeah, they seem to think that just becoming Huge automatically gives you greater reach. You are most likely correct in your interpretation, while I am not.
Helpful rewriter of Japanese->English translation and delver into software codebases (she/e/they)
25-30 feet, pretty good for melee reach.
In general, you're looking for "increase by," not "increase to." All the things you listed can stack (automatic size-based reach adjustment notwithstanding). The only thing I can think of that doesn't, is the Eldritch Claw Tattoo, which allows you to strike targets 15ft away but doesn't actually seem to modify your reach.
As an aside, I hate the Potion of Giant Size. It's supposed to be a big story beat in an adventure, but instead it's just listed as a magic item and everybody treats it like it's normal gear that you can buy. Though in that adventure I'd argue it's not even particularly a big deal -- it comes in too late to be genuinely useful, and there's no buildup to it or anything. Dumb, dumb, dumb.
I was under the impression that merely becoming huge gave you increased reach.
Thanks for the clarification, that makes sense.
Even without the Potion, the following is a possible build:
Normall reach = 5 ft.
Bugbear = reach +5
3 Levels of Monk (4 elements), getting Fangs of Fire Snake = +10 reach
and 3 levels of Battlemaster for Lunge Manuever, +5 reach
===========
25 ft reach.
Pretty large reach, even if you are using a Maneuver and ki points to get it.
Juggernaught Fighter is 18 levels, so you'd have to give up the Monks +10 for the mere +5.
Reach isn't so useful if you can't use it for Opportunity Attacks - with this build your reach is only 10 ft for OA.
Rules technicalities aside, it would be realistic for features that expand your attack reach to stack. It just kind of makes sense.
Panda-wat (I hate my username) is somehow convinced that he is objectively right about everything D&D related even though he obviously is not. Considering that, he'd probably make a great D&D youtuber.
"If I die, I can live with that." ~Luke Hart, the DM lair
The highest I’ve calculated is 55 feet, 60 with an optional rule.
Eldritch Claw Tattoo: 15ft base (Eldritch Maul) instead of 5ft
Living Shadow (Dark Gift): +10ft (Shadow Strike)
Fangs of the Fire Snake: +10ft (Way of the Four Element Monk)
Bugbear: +5ft
Potion of Giant Size: +5ft*
Lunging Maneuver: +5ft. (Battlemaster Fighter)
Avernus’ demon ichor coated weapon or fist: +5ft
that leads to 55ft
*With the miscability optional for potion, it could have the potential to double its effect, bringing the grand total to 60ft. Though this is based on something unpredictable and possibly not used at your table. Similar with Dark Gifts which are setting specific. Demon ichor would require you to come across it, same with the Eldritch Claw Tattoo and the potion. The rest is fairly attainable and build only (requires less input from the DM—which is still a reasonable 25ft.)
you can also replace Monk for Juggernaught Barbarian with a Glaive (each giving a +5ft) for the same result.
That checks out. All of these either increase the reach of all melee attacks or any melee weapon attack, with the only exception being fangs of the fire snake specifying unarmed strikes.
As path of the juggernaut has not been officially printed, I wouldn't count it as a replacement for 4 elements monk.