Tuskton's Sanitizing Smite

The next time you hit a creature with a melee weapon attack during the spell’s duration, your weapon glows with cleansing light, and the attack deals an extra 1d8 + spellcasting modifier radiant damage to the target and causes the target to be cleansed. At the start of each of its turns until the spell ends, the target must make a Constitution saving throw. On a failed save, it takes 2d6 radiant damage. On a successful save, the spell ends. 

Monstrosities, Oozes, and Undead make the saving throw at disadvantage.

At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher, the initial extra damage dealt by the attack increases by 1d8 for each slot.