Make a  spell attack against a creature you can touch. On a hit, the target takes 3d12 necrotic damage.

At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher, the damage increases by 1d12 for each slot level above 1st.  When you cast this spell with a spell slot of 3rd or higher, a creature that takes damage from this spell also becomes diseased until the beginning of your next turn.