[RPG] Does True Strike end before it is useful

cantripsdnd-5edurationspells

True Strike has a duration of "concentration, up to 1 round". But it says "On your next turn, you gain advantage on your first attack roll against a target, provided this spell hasn't ended."

But True Strike has to have ended, because a round has elapsed. How is that not true?

Best Answer

The way I've interpreted this is that the spell itself, the casting of it, takes the duration of one round, your current action. The effect itself does not take place until your next turn as stated in the spell text proper. Once your next turn begins the spell is active, so to speak, and for the duration of that round you gain the advantage listed.

Furthermore if concentration is lost between casting and actual use, you'd resolve it as you would normally for checking on a break in concentration.

TRUE STRIKE
Divination cantrip
Casting Time: 1 action
Range: 30 feet
Components: S
Duration: Concentration, up to 1 round

You extend your hand and point a finger at a target in range. Your magic grants you a brief insight into the target's defenses. On your next turn, you gain advantage on your first attack roll against the target, provided that this spell hasn't ended.

So cast spell, wait for next turn, spell effect is active for that turn, profit.

Furthermore I'd treat an attack on that turn that a PC might be able to make as a bonus action as the "next turn" attack with advantage, aka the first attack roll against the target mentioned in the spell proper. But the text is pretty clear that it starts working on your next turn, so that would likely be up to the DM.