what exactly happens when kayn transforms to shadow assassin?
what happens to rhaast, and how does it change kayn's physical appearance so drastically?
what happens to rhaast, and how does it change kayn's physical appearance so drastically?
Seemingly if Kayn becomes the Shadow Assassin he basically gains enough expertise in shadow magic and power in said magic to kill Rhaast, making his corpse a host for that shadowy power. Kayn himself, so infused with that magic, has his appearance change to match, becoming paler with distinct markings.
So tl;dr Rhaast dies, his corpse becomes a shadow magic weapon, Kayn goes super shadow saiyan. I think.
I guess he'd call Rhaast the Blade of Millennia in this form? I dunno. Title for his short story feels weird to me if that's not the outcome if Kayn wins out over Rhaast in the end.
https://universe.leagueoflegends.com/en_US/champion/kayn/ 1x Kayn universe page, from which you can follow Riot's links to every canon lore story ever written about him (which, considering how recent he is, is all of them).
I didn't take the time to read through all this to figure out which one exactly is the right one because it's 11 and I need to be up at 5 for work, but it shouldn't be too hard to find. It'd just take me too long this late at night.
CoolRadius mentioned he infuses the scythe with shadow magics to drive out Rhaast’s spirit, leaving behind his vessel and a small amount of his power that lingers in the scythe
Magic?
I always thought it was a time skip, where rhaast eventually becomes so inactive he becomes dormant. And Kayn becomes older eventually mastering the shadow assassin.