Suggestion spell 2024 : the concentration part

Hi everyone, 

I'm quite stuck with the suggestion spell (2024). it seems to be powerfull to broken.

But the duration is 8Hours or till the task is completed, with concentration.

Does it means that you have to maintain concentration during a long time (8 hours)? so the spell is becoming quite useless 

in a dungeon/multiple fights point of view and stay powerfull only on rp/social side.

Do i miss something plz ? 

Yes, the spell ends if you stop concentrating on it, but it's no useless. Most control spells either last 1 round or let the target repeat the save every turn. With Suggestion, if the target fails, they're completely out of the fight for good. Having to keep concentrating on it is a small price to pay, I'd say :)

8 hours or until the task is completed can easily mean that the spell lasts just several turns or rounds.  "Lock yourself away in that guardroom for your own safety dear friend."  Might be accomplished in a single turn yet remove them from the fight altogether.

I was too much focused on the possibility of total duration, U're totally right, thks a lot, it will help my table :)