Lets create some broken, yet cool passives we would love to see
I'll start.
Manual attack: (insert champion name) has no attack speed modifier, instead, the player manually clicks the enemy champion to fire on them. The faster the click , the faster the auto attack. The attack speed modifier on items is reduced by 2/3 and just affects "attacks per click".
In theory, if someone clicks fast enough they could be faster than Kogmaw. Obviously, modified mice would not work with this character so no million of clicks per second cheats.
This sort of character might be best used with the "ranged version of Udyr" concept that is still on the shelf since it would require so much concentration just to attack, as this character exclusively rewards apm players.
What concept or mechanic would you like to see?