You call out a creature, commanding it to rot. Make a ranged spell attack against the creature to cause it to decay prematurely. On a hit, the target takes 3d6 necrotic damage, and it can't regain hit points until it has rested.

If you hit an undead target, it also has disadvantage on attack rolls against you until the end of your next turn.

This spell's damage increases by 1d6 for every higher spell level you cast it.