Degenerate Life

Choose a creature you can see within 60 ft of you.  The target must make a Constitution saving throw.  They take 3d8 necrotic damage and are poisoned for one round on a failed save.  On a success, they only take half damage.

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.