You create a whirlwind of holy energy in a space that you can see within range. Until the spell ends, the holy whirlwind fills a 5-foot cube. Any creature in the whirlwind’s space when you cast the spell must succeed on a Wisdom saving throw or take 1d4 Radiant damage. A creature must also make the saving throw when it moves into the whirlwind’s space for the first time on a turn or ends its turn there.

You regain hit points equal to half the damage dealt, rounded according to your DM.

Cantrip Upgrade. The spell’s damage increases by 1d4 when you reach 5th level (2d4), 11th level (3d4), and 17th level (4d4).