Dark Gnaw

You cause a swarm of dark insects to appear and feast on one creature you can see within range. The target must succeed on a Constitution saving throw, or it takes 3d8 necrotic damage on a failed save, 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.