Wren's Othershoes

When you cast this spell, choose two Humanoids within 30 feet of one another. Each target must succeed on a Wisdom saving throw or take 3d8 psychic damage. If both targets fail their saving throw, they are cursed for the duration of the spell, and while they both remain cursed, they swap bodies, retaining their original personalities but exchanging all of their game statistics, other than alignment and Intelligence, Wisdom, and Charisma ability scores. Additionally, they have disadvantage on Charisma checks related to convincing others of their new forms.

For the first hour of the curse's duration, both targets have disadvantage on attack rolls, and if they attempt to cast a spell of 1st level or higher, they must expend a spell slot of one level higher than the spell they're casting, and don't receive any benefit from using a higher-level slot.

If the targets have quarrelled with one another within the past minute, they have disadvantage on the saving throw and the effect is permanent unless removed by a Remove Curse or Greater Restoration spell, or similar magic. You can also choose to end the spell by using an action to dismiss it.

Credit: Created by the World's Beyond Number team for their homebrew Witch class, as seen on "The Wizard the Witch and the Wild One".