Noxious Burst

You create a dark bubble at a point within range, which explodes releasing noxious fumes in a 10-foot-radius area. All creatures within the area must succeed on a Constitution saving throw or take 1d6 Poison damage and be poisoned until the end of your next turn.

Cantrip Upgrade. The damage increases by 1d6 when you reach level 5 (2d6), 11 (3d6), and 17 (4d6).