Trap: Prophecy of Provoked Opportunity

Trap: Prophecy of opportunity if a adversary provokes an opportunity attack and moves at least 20 feet before attempting to hit you, they gain disadvantage for their entire turn, and if they successfully hit you they must make a dc (10 + spell modifier + proficiency) dex save or take 2d8 damage of the same variety they dealt to you, on a failed save they take half. At higher levels gain 2d8 damage per level.