Swathe of Malady

A wide sweeping motion and a scattering of ash causes a swathe of necrotic energy to emanate from the casters hand in a cone in front of them. Each creature in a 15-foot cone must make a Constitution saving throw. A creature takes 2d8 necrotic damage on a failed save and is poisoned until your next turn, or half as much damage on a successful one.

At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher, the damage increases by 1d8 for each slot level above 1st.