An Awesome Kayn Skin, KandyKayn
basically Kayn's scythe would be a huge candy cane and he would wear a Christmas Hat in kayn form and also wear PJs like he was kid. When he turns into Rhaast he would turn into Krampus, But Shadow Kayn would become Santa Claus but instead of his hear flip back and flowy but as a huge white flowy beard and when he ults he has chimney over their heads and he goes through it [zombie-brand-mindblown] 
Sorry for horrible details and lack of content but this was just a random idea that I thought would be great