Vahn's Venomous Veil

you hold your hand up to your mouth and blow. A plume of choking spores flies out in a 15ft. cone. All creatures within the area must make a Constitution saving throw or take your spellcasting modifier poison damage, suffer the poisoned condition until the start of your next turn, and must immediately use their reaction to move in a random direction out of the area. Creatures that make their saving throw are unaffected; however the area is heavily obscured until the start of your next turn.

If any flame touches the obscuring spores they immediately burst into flame and all creatures in the affected area take 1d4 fire damage as the spores burn away.

At 5th level creatures that fail the Constitution save also suffer an additional 1d12 poison damage. This damage increases at 11th level (2d12) and 17th level (3d12)