“Kayn is a very easy matchup for you. Make sure you apply constant pressure by invading and killing him/pushing him off his camps if you have the laner advantage. If you don't have the laner advantage, look to gank more than invade. Be careful of him post form. He will be able to 1 v 1 you if you miss cocoon, and he's also much stronger in teamfights.”
“Most likely a skill matchup. his Red form W is annoying for you.
If you use your W on Kayn and he decide to ult you, the W will keep going !”
“Red Kayn is a nightmare. He outdamages, outsustains and is more mobile than Nunu. Not to mention he can knock you out of your R. ”
“Blue kayn is no threat at all as you can cc him without him being able to do anything, and he is easy to beat early game through invades not allowing him to farm and scale like he needs to. Only chance Kayn has is when he goes red Kayn and outscales Warwick around 3 items. Try to push lead to end before then”
“Both great at clearing the jungle. Remember that some Kayn players tend to clear from birds to krugs first. If you see him do leashless you might want to invade his blue. You will outdamage him and can kite him for most of the early game but he definitely scales better into teamfights, if he goes Rhaast. If your team still doesn't have Grievous wounds by then, be sure to get it. Ward for invades, so he doesn't sneakily take your raptors and then your red after it while you're doing it!”
“Kayn will full clear so will you. He can 1v1 you late game super easily. He can also invade you easily.
“Blue kayn is scary, red not so much. Consider red smite to avoid one shots, you win fights pre 6 so look for these if you can. Might want to go deadmans 2nd in this match up. Remember he can dodge your ult with his own, and he can go through walls to safety as well. relatively hard match up in my experience. ”
“Red Kayn is a great counter to any tank. High sustain, can interrupt your R with his knock up, hard to pin down, and can threaten objective steals. Great clear speed as well.”
“After 10.25 Kayn nerfs, this matchup has become easier. In this matchup, you can bully him before transform to try and establish a jungle and lane lead before he hits transform. Ignite and Phase Rush can be helpful to establish an early lead or you can opt for a more scaling build path like Crit or Bruiser to contest his powerful late game, but this will require strong/winning lanes that can survive pressure while you scale. Grit stacking for first scuttle is essential to pick up a free lead if Kayn contests at scuttle.”
“Kayn is extremely easy to bully in the early game, but if he gets ahead of you he can be a real pain. Try to counter gank and keep him down in the early game. Be hyper aware of moving in a way that will help you dodge his W's, as that is a core part of his kit. If you build lethality and are a little ahead, you can 1 shot him with your combo before he can ult you. ”