Kassadin
Passive: Remove damage reduction. New effect: Whenever he casts a spell he receives a magic damage shield for 1 second. No cooldown but doesn't stack.
Q: Remove shield, drop cooldown to 5 seconds.
W: Remove mana restore, drop cooldown to 5 seconds.
E: Remove charge mechanic, drop cooldown to 5 seconds.
R: New effect: Damaging an enemy champion with riftwalk resets the stacks.
Balanced