Void-touch

Corrupted energy festers up from the inside of the target. The target makes a wisdom save against your spell DC. On a failed save they suffer 1d6 necrotic damage and the next creature to attack the target ,before the end of your next turn, adds a d4 to the attack roll.

This spell’s damage increases by 1d6 when you reach certain levels: 5th level (2d6), 11th level (3d6), and 17th level (4d6).