Hydaelyn

You create a cloud of toxic mist in a 10ft. radius sphere at a location you can see within range. Each creature in the affected area must succeed on a Constitution saving throw or take 4d4 poison damage and become poisoned for 1 minute. On a success, creatures take half as much damage and suffer no other consequences. At the end of a poisoned creature's turn, they reattempt the saving throw, ending the poison on a successful throw.