Disrupt Undead

You direct a ray of positive energy toward an undead enemy, disrupting the force animating it. Make a ranged spell attack against the target. On a hit, the target takes 1d8 radiant damage. If you direct this spell against an undead target it also has disadvantage on the next saving throw it makes before the end of your next turn.

At Higher Levels. This spell's damage increases by 1d8 when you reach certain levels: 5th level (2d8), 11th level (3d8), and 17th level (4d8).