Larian Studios Forums Baldur's Gate III Baldur's Gate III - Technical & Gameplay Problems Reaction: Hellish Rebuke does not work

I used this earlier, cast it and it puts a sort of buff on you. You should see it active in the right end of your ability bar.

If the buff is active and something hits you your character then will do a sort of casting fire animation and after that I believe the buff is gone and needs to be cast again.