Two Wolves

You summon two wolves: one made of pure light and the other made of pure darkness. Choose a creature within range. It must make a Constitution saving throw. On a failed save, the wolves enter the target's body, frightening the target. On a successful save, the spell fails, and you can't cast this spell on that creature for 24 hours.

At the start of each of the creature's turns, it takes 10d8 piercing damage, 5d8 radiant damage, and 5d8 necrotic damage. If the creature is reduced to 0 hit points, the wolves are dismissed, ending the spell.

Disclaimer: This spell is intended to be a joke spell. Please do not take this spell seriously.