First of all I´m no expert or high elo god in this game, but I´ve found this fun little build. So in lower elos people tend to team fight, LIKE A LOT. Everything until gold is pure chaos people roam mid to fight like after platings fall. So I´ve come up with a Build that does a decent amount of damage and still helps you to sustain.

So this item seems amazing, maybe not on Kayn but you can definitly make it work. So first of all the items gets triggered by CCíng your opponent or SLOWING THEM. Here comes our Blue Boi, W and Stride trigger this item. So if youre going for a full burst combo youll get a heavy shield most of the time. Your R helps with dodging high damaging abilities or CC. + Stride is on a low 6 second CD due to the runes.

Not a lot to say you go in get a kill hide in a body, come out hit W or Stride to proc your Fimbulwinter and you deal decent damage. + the ability haste comes in clutch.

Item gives you okay damage, the passive feels really nice tho, getting MS per item and when damaging something. + it helps with clearing camps, easy and fast invades.