Inspired by Rem's pillow cooldown mechanic, I think this could be an interesting spirit-brawler upgrade to Rebuttal. If it isn't clear, the passive portion procs off of 1 parry on an enemy (so 1 parry affecting 2 enemies = 10s cooldown reduction, then goes on CD for 12s). The Rebuttal portion...
Flyers can feel very oppressive in lane when your only options feel like Knockdown or to play hide and seek. What about a T 1/2 item that either slowly drags an airborne player down the longer they're in the air, or reduces their airborne agility (movement/dash speed) by like 10%? Call it "Lead...