Illrigger spell - Vengeful Blade - would it break the targets concentration

Quote from Wtfdndad >>

 The tense is actually not present tense. " If the target makes an attack or casts a spell before then, the target takes 1d8 necrotic damage and the spell ends." This sentence requires you to understand what future tense with "if statements" are.

 

 In the phrase "If the target makes an attack or casts a spell," the verb casts is in the present simple tense (third-person singular) and therefore its not past tense as you referred as "casted" . 

Cue can also be found in the other verb make in the sentence. If it was past  it would have said  "If the target made an attack roll or cast a spell" 

Quote from Plaguescarred >>

Quote from Wtfdndad >>

 The tense is actually not present tense. " If the target makes an attack or casts a spell before then, the target takes 1d8 necrotic damage and the spell ends." This sentence requires you to understand what future tense with "if statements" are.

 

 In the phrase "If the target makes an attack or casts a spell," the verb casts is in the present simple tense (third-person singular) and therefore its not past tense as you referred as "casted" . 

Cue can also be found in the other verb make in the sentence. If it was past  it would have said  "If the target made an attack roll or cast a spell" 

 If you rake my lawn, I will give you $20. If Plaguescarred rakes my lawn, I will give them $20. Are you done yet? No. Then I won't be giving you $20.

Quote from Wtfdndad >>

 If you rake my lawn, I will give you $20. If Plaguescarred rakes my lawn, I will give them $20. Are you done yet? No. Then I won't be giving you $20.

 That is not what Vengeful Blade say. Will & done yet isn't in the spell description. Essentially its:

If you cast a spell, you take necrotic damage. Are you casting a spell? Yes. Then you take necrotic damage.

Quote from up2ng >>

Quote from SmiteMakesRight_3_5 >>

The timing is not clear.

Longer Casting Times

Certain spells—including a spell cast as a Ritual—require more time to cast: minutes or even hours. While you cast a spell with a casting time of 1 minute or more, you must take the Magic action on each of your turns, and you must maintain Concentration (see the Rules Glossary) while you do so. If your Concentration is broken, the spell fails, but you don’t expend a spell slot. To cast the spell again, you must start over.

The rules refer to an interrupted spell as a cast spell. That may mean that process of casting a spell triggers the effect and the damage is taken during that action. 

It doesn't say that though.  Look at what you've just quoted.  It says "more time to cast" and "while you cast a spell".  It's describing the casting of the spell as a time-consuming process.  The spell isn't actually cast until that process is complete.  Spells such as Counterspell are specifically written to be able to interrupt this process before the spell is cast. 

It does though. Compare it to effects that trigger when a creature attacks/is attacked or when an attack hits. The attack is not fully resolved unless the effect explicitly says that it occurs after the attack.

Following the same design language, triggers when a creature casts a spell does not wait for the spell casting to complete and resolve.

However, I also see your reading as valid. It also makes the Cantrip a little stronger. I don't think it needs the boost, but I also don't think it would hurt much either.

Quote from Wtfdndad >>

Quote from Tarod_ >>

To me, "To cast the spell again, you must start over" is basically saying that if you want to cast it another time, you don't pick up where you left off or reuse any progress, you go back to the beginning of the casting process.

 This means if you want to try to attempt to cast the spell again. Not that you casted anything, you failed and must start over, Pretty simple.

 Eh... yes?

Quote from Plaguescarred >>

Quote from Wtfdndad >>

 If you rake my lawn, I will give you $20. If Plaguescarred rakes my lawn, I will give them $20. Are you done yet? No. Then I won't be giving you $20.

 That is not what Vengeful Blade say. Will & done yet isn't in the spell description. Essentially its:

If you cast a spell, you take necrotic damage. Are you casting a spell? Yes. Then you take necrotic damage.

 

 

The rules in D&D state that the rules should be relatively easy to understand. In my lawn raking example the majority of people would probably think that you must finish the task of raking before you receive the reward. I don't feel this is a far-fetched interpretation. What I put in bold print doesn't actually need to be there for you to understand this. The examples listed below are set up and they mirror each other in conditions and effect in principle.  

1)If you rake my lawn,

A)If you cast a spell,

2)I will give you $20.

B)You take necrotic damage.

Quote from Wtfdndad >>

The rules in D&D state that the rules should be relatively easy to understand.

Do you have a reference for this claim? 

Quote from Wtfdndad >>

1)If you rake my lawn,

A)If you cast a spell,

2)I will give you $20.

B)You take necrotic damage.

There are assumed contexts in English that you are carrying over inappropriately from example 1-2 to A-B.

"If you rake my lawn ..." is condition for a contract that implies completion of a service.

"If you cast a spell ..." does not carry the context of a contract for completion of a service.

If that creature comes next to me, I will punch you. When the creature walks past the speaker, on completion of the move, they may be 15 feet on the other side, but during the move, they came next to the speaker and were punched. If that punch prevented the creature from continuing the move for some reason, it is interrupted.

Not all conditions require completion. Not all conditions are only tested on completion.

Quote from Wtfdndad >>

Quote from Plaguescarred >>

Quote from Wtfdndad >>

 If you rake my lawn, I will give you $20. If Plaguescarred rakes my lawn, I will give them $20. Are you done yet? No. Then I won't be giving you $20.

 That is not what Vengeful Blade say. Will & done yet isn't in the spell description. Essentially its:

If you cast a spell, you take necrotic damage. Are you casting a spell? Yes. Then you take necrotic damage.

 

 

The rules in D&D state that the rules should be relatively easy to understand. In my lawn raking example the majority of people would probably think that you must finish the task of raking before you receive the reward. I don't feel this is a far-fetched interpretation. What I put in bold print doesn't actually need to be there for you to understand this. The examples listed below are set up and they mirror each other in conditions and effect in principle.  

1)If you rake my lawn,

A)If you cast a spell,

2)I will give you $20.

B)You take necrotic damage.

 The problem with your example is that it depend on someone else posing an action by giving you 20$

In the case of Vengeful Blade, the target is under an effect as it radiates a dark aura of energy and take damage if it does something, independent of anyone else's action.

Quote from Plaguescarred >>

The reason Counterspell say you attempt to interrupt a creature in the process of casting a spell is because normally In terms of timing, a Reaction takes place immediately after its trigger unless the Reaction’s description says otherwise.

The Counterspell Reaction does take place immediately after the trigger.  The trigger in that particular case is that you see someone casting a spell.  Right after that you can attempt to interrupt that process while that creature is still trying to cast it.  I was pointing out that this is different than the feature that we are talking about in this thread because of this explicit timing which does not exist with this feature.

Quote from Plaguescarred >>

If you cast a spell, you take necrotic damage. Are you casting a spell? Yes. Then you take necrotic damage. 

Nope.  "If you cast a spell" is a totally different concept than "Are you casting a spell".  See the Counterspell example above.

Quote from SmiteMakesRight_3_5 >>

Quote from up2ng >>

Quote from SmiteMakesRight_3_5 >>

The timing is not clear.

Longer Casting Times

Certain spells—including a spell cast as a Ritual—require more time to cast: minutes or even hours. While you cast a spell with a casting time of 1 minute or more, you must take the Magic action on each of your turns, and you must maintain Concentration (see the Rules Glossary) while you do so. If your Concentration is broken, the spell fails, but you don’t expend a spell slot. To cast the spell again, you must start over.

The rules refer to an interrupted spell as a cast spell. That may mean that process of casting a spell triggers the effect and the damage is taken during that action. 

It doesn't say that though.  Look at what you've just quoted.  It says "more time to cast" and "while you cast a spell".  It's describing the casting of the spell as a time-consuming process.  The spell isn't actually cast until that process is complete.  Spells such as Counterspell are specifically written to be able to interrupt this process before the spell is cast. 

It does though.

 

No.  It does not say that.  I'll quote it again:

If your Concentration is broken [while you cast a spell with a casting time of 1 minute or more], the spell fails, but you don’t expend a spell slot.

This spell has not been cast.  The attempt to do so failed.

The lawn raking example above is an excellent one.

Here is another:

A creature finds a cursed magical coin.  The description for the coin says:  "If a creature flips this coin, it dies instantly". The creature attempts to flip the coin.  He successfully flips it.  As a result, it dies.  Upon its death, the coin can be seen flipping through the air -- because the coin was actually flipped.  The creature does not die in the exact instant that his thumb begins to move because at that moment that coin has not yet been flipped.  He is flipping it, but the prerequisite that a creature "flips this coin" has not yet occurred since the coin is not yet in the air.  This death cannot actually prevent the coin from flipping by interrupting the process.  Instead, it happens as a result of the event happening.

If instead, the description stated something like:  "When another creature sees someone flipping this coin" (similar to how Counterspell is worded) then the timing of the trigger would be different, and the creature death could actually prevent the coin from flipping.  It is a nuanced but important distinction.

Vengeful Blade has nothing to do with Counterspell so any comparison is moot. 

Quote from Plaguescarred >>

Vengeful Blade has nothing to do with Counterspell so any comparison is moot. 

You've missed the point twice now.  I was pointing out that the wording (and therefore the timing) for Counterspell is different than the feature that we are talking about in this thread.  The interpretation that you are arguing for aligns more with the sort of wording that exists in Counterspell and NOT with the wording that exists for this feature, which is different.

Quote from up2ng >> 

The lawn raking example above is an excellent one.

Here is another:

"If the target makes an attack or casts a spell before then, the target takes 1d8 necrotic damage and the spell ends."

"Once within the next hour when the creature fails a D20 Test, the creature can roll the Bardic Inspiration die and add the number rolled to the d20, potentially turning the failure into a success."

The d20 test has not resolved and neither has the spell.  

Quote from up2ng >>

No.  It does not say that.  I'll quote it again:

If your Concentration is broken [while you cast a spell with a casting time of 1 minute or more], the spell fails, but you don’t expend a spell slot.

If you can't make your point without injecting text into the rules quote, your point may not have a basis in the published rules.