Avert Blow

From Kronopolis and the Flat Plane

"You deflect an incoming attack." -Description

Tier 1 As a reaction, when you or a creature you can see within range is attacked, you can contest the attack roll with your own attack. If you succeed, the attack misses.
Tier 2 Until the start of your next turn, including against the triggering attack, you or your adjacent ally has a +2 bonus to AC while you are not incapacitated.
Tier 3 If you shield a creature with Avert Blow and the creature is not hit, they can with a reaction move 10 ft. without provoking reactions.