When you are attacked you jump back 5 feet ripping a copy of the attackers soul where you were last standing. (if the original attack breaks the ac or the soul fails the save it takes the attack in your place) 

This soul has 15 hp and matching stats to the attacker. the soul lasts until the end of your next turn. As a bonus action you can command the soul to attack or use a spell, however if the attacker didn't have the spell slot or the spell available the soul doesn't either and wastes the turn if commanded to do so. The soul will automatically take attacks of opportunity and any damage that the soul takes is mirrored back to the original attacker.

Once the soul is destroyed or the duration is over the soul returns to the attacker.

When cast at a higher level than 2 the soul has 15 + (10* spell slot  level) hp.

This spell can only be used on each opponent once and can only be used on creatures of medium size or lower