Dimensional Transposition

You trade places with a creature you can see within range via teleportation. An unwilling creature is allowed a Wisdom saving throw to resist the effect, with a success foiling the spell and dealing 1d8 points of damage to you in a magical backlash.

You can cast this spell as a reaction when an enemy attacks your ally within range or targets them with a spell. You trade places with your ally via teleportation and become the new target of the attack or spell. Your ally may still be subject to the effect if you would have been affected in your original location.