Eclipse Defense
Source
Fly Free or Die: Merchants of the Void pg. 53
You can cause your melee weapon to exert a gravitational pull, drawing strikes to meet it. If a creature hits you or a creature adjacent to you with a melee attack and you're wielding a melee weapon, you can make a melee attack roll against the attacking creature as a reaction. If your attack exceeds the attacking creature's KAC + 8, you don't deal damage; instead, the target's attack deals only half damage.
When you are attuned or fully attuned, you gain a +4 bonus to your attack roll to use this revelation.
Dragonscript
ID
695c992bc368709d779ec176