Unexpected Transposition [Obscure Arcana]

This spell cannot be learned without the possession of a Tome of Obscure Arcana or a Scroll of Unexpected Transposition

When attacked, you attempt to quickly swap your own position with that of another creature. Choose a creature within range, if that creature is unwilling to swap places with you, it must make a Charisma saving throw, switching places with you on a failure. Willing creatures automatically fail.

If you successfully switch places with the target, the triggering attack is resolved against that creature as if it had been the original target of the attack. After the swap, you and the target are both temporarily immune to unexpected transposition spells for 1 minute. You automatically switch places if the target is willing. If it's unwilling, it must make a charisma saving throw. Neither of you teleports if the target succeeds at its save.