Decay

Seething necrotic tendrils lance toward a creature that you can see within range. The target must succeed on a Charisma saving throw or take 1d8 necrotic damage, as the spell eats away at their flesh. Additionally the target has disadvantage on its next saving throw, if it took damage from this spell.

The spell's damage increases by 1d8 when you reach 5th level (2d8), 11th level (3d8), and 17th level (4d8).