Toxic Bloom

You summon forth a burst of toxic, spore-laden air from within yourself and expel it in a cone shape in front of you. Each creature in the cone must make a Constitution saving throw. On a failed save, the creature takes 3d8 poison damage and becomes poisoned. On a successful save, the creature takes half as much damage and is not poisoned.

Additionally, at the start of each of their turns, poisoned creatures take an additional 1d6 poison damage and must make another Constitution saving throw. If they fail, they remain poisoned, but if they succeed, the poison effect ends.

At higher levels: When casting this spell using a spell slot of 3rd level or higher, the damage increases by 1d8 for each level above 2nd. The duration of the poison effect increases by one round for each spell slot used above 2nd level.