idea add RNG cc to the game (not as crazy as it sounds)
Either across the game entirely or try it out on a new champion see how it goes. What made me think of this is Docus Arena a tactical turn based PvP game, if you walk up to enemy and didn't face them and wanted to move away depending on who myou face you had a chance to lose turn. This encouraged you to all in and die or try retreating and risk failing/losing turn. It was a really cool game and well thought out
So in this case perhaps if an enemy used a spell on you you have a 20% chance to slow them etc. This could be increase typically on tank or support items. Supports could have mastery and item that adds have RNG to add say 10% extend cc duration or what have you...
In the case of champion could have aura that has chance of cc someone. Chance could increase if surrounded by more enemies etc. In a way we already have this with say skarner applyng stacks and icing target with passive. Same with ekko. Except not so much dependent on chance since you do the work.
Could even be for things like shields movement speed buff.
hi there be stunned for 5 seconds