Feinting Attack

From Kronopolis and the Flat Plane

"You attempt to feint an attack, opening their defenses." -Description

Tier 1 Contested Perception (Insight) check. If you succeed, you have advantage on your next attack roll against that creature until the end of your next turn.
Tier 2 If you hit your follow up attack, the target must make another contested check.
Tier 3 Each time you succeed, you decrease the target's AC bonus from Dexterity by 1 until the end of your next turn.