I know that everyone is op in ARURF (duh..) but Cassiopeia is just something else.
0.15 second Cooldown on E E can be boosted for more than double damage and free healing She also has a stun (2s) and an ability to prevent people from escaping (5s) Her E does about 15% of the enemies health per cast Her Q does about 25% and gives her a movement speed boost You do the math and find out why this is broken.