Penance Stare

You grab a creature with an evil alignment by the head and force them to stare into your eyes. Your gaze uses the blood staining their soul as a fuel to burn it away. Target must make a constitution saving throw or take 4d6 necrotic damage and half as much on a success.

The spell’s damage increases by 1d6 at level 5 (5d6), level 9 (6d6), and level 17 (7d6).