Kayn needs a clarity update for his passive and in game icons.
I'm sure this has already been mentioned a few times before, but this is still a peeve when playing as Kayn. The simplest would be to just place a red and blue meter on either half of where the white circle is over his champ icon. Even though you can kind of gauge which transformation you're likely to achieve based on who you've attacked in the game, a meter (maybe even underneath his mana bar?) would help alot in terms of clarity.
Also, on the same note, what are the numbers exactly for filling up the meter? How much essence (that's what i'm calling it for now) does he get for: -Auto attack -Ability attack -Assist -Kill on target champions?
Lastly, his in game icons should be following his transformation along with his in game champion name. Rhaast transformations should include the Rhaast icon in all of the appropriate places along with the name "Rhaast" showing up in the chat logs. This goes vice versa with the SA transformation icons as well, although the name "Kayn" could remain in the chat logs. This is more for cosmetics i suppose, but if we already have "Eggnivia" and "Mega Gnar" we should at least have "Rhaast".