Thunderous Protection

Select a willing creature in range that you can see (can be yourself) the creature is coated in a translucent pruple cloak that shimmers around them for the duration if they are targeted by a melee attack while this effect is active (even if the attack misses) the attacker takes makes a con save on fail they take 1d8 thunder damage and are pushed back 5ft on sucess they take half as much damage and are not pushed back.