So Blue Kayn is completely busted
You can spin it which ever way you feel but to be able to avoid walls entirely and pop up just to one shot a champ and ghost right back into the walls is beyond busted. Even Talon has a limit at how he does it, can't hop the same wall for a decent amount of time. Rengar can hop walls but only with vision of a target. Kayn just slaps on some assassain gear buys mobi's and runs down your adc's when ever a fight breaks out just to dip out and do it all over again a few seconds later. So for now until Riot realizes they created a monster he's going on my Ban every game list.