Body Snatch

You swap an aspect of your physical form with a creature. You choose one of the target's physical ability scores - Strength, Dexterity, or Constitution. The target must make a Charisma saving throw. On a failed save, you swap ability scores with the target. The target can willingly fail the save if it chooses. 

At Higher Levels: When you cast this spell using certain higher-level spell slots, you choose more ability scores to swap - 2 scores with a 6th-level spell slot, and 3 scores with an 8th-level spell slot.