Starlight Kayn guide
Hello this is promised Kayn guide by me, sorry it took quite some time, but since its my first guide its hard to put my practice into words. Well here it is.
Runes:
I always run Dh>sudden>sixthsense>treasure>cashback>cosmic>double adaptive>scaling hp
this is no brainer i never change this no matter what
Pet:
If enemy team have burst assasin(Qyiana, aurora) go green pet otherwise go red one, blue pet is bait, you as Kayn rarely go around bushes anyway.
Build:
The standard build is Voltaic>Serpents>t2 boots>axiom>serylda/ldr/(mortal is also viable in some cases)>edge of night/ga
This setup is cheap make you spike sooner to compensate playing no form and allow you to beat enemy jungler in duel. On first recall you should get double sword/pickaxe. Dont fall for brutalizer bait its really bad item to rush you will be much better getting pickaxe and boots.
Just trust me on serpents its really cheap stat stick item and deals very good with shield users that are in almost every game like enchanters or mele champions that rely on shield yasuo/yone.
in 90% cases you rush Voltaic thats just no brainer, unless you are giga fed with big lead early then its possible to rush Hubris into Voltaic and skip Serpents entirely.
With Blue form you go lucidity or defensive boots.
On Rhaast never go lucidity boots always defensive or gluttonus.
Late game you can sell boots for Yommus.
Ignite>flash:
Many of you would ask why ignite over flash. Its because smite is better for early skirmishes and duels especially if you invade a lot like me, it also give you second option to insta ult someone if your smite is down. But there could be argument that flash could be better if you cant access enemy carry so easly.
Form:
With this setup you should comfortably play either of forms so you dont have to separate setups for each form differently. Blue is generally better for faster paced games where you need his mobility. Rhaast is good into shutdowning mele bruiser carries, but with this setup you should be also easily be able to oneshot enemy carry. Most important things is that you dont chase form. You can just farm and go for free ganks and fights. The longer game goes the more orbs you get. Dont chase the form keep up tempo, base Kayn is strong enough to be even with most junglers if you are even in gold and xp, especially if you run ignite, many of enemy players wont expect it. You should have form by 15 min. for example you hit Rhaast form at 12 min, you can wait 3 min till 15 mark to wait out blue form. But if you hit Rhaast at 15 min, just stick with him unless its really bad matchup for you.
If you have any questions i will answer you in comments