I have a pleasure working on Odyssey Kayn, one of the skin in Odyssey Event 2018. This is an amazing effort from Riot Art team. I only helped on texturing Odyssey Kayn. Most of the work is done by Bogdan (he's Amazing)
Sculpt and Model - Bogdan https://www.artstation.com/bogdanbl4
Concept - Simon - https://www.artstation.com/simondubuc
Konstantin - https://www.artstation.com/zoonoid
Splash Art - Esben Lash Rasmussen https://www.artstation.com/lash
VFX - Brian Vinton
Animation - Jesse Baumgartner, Christopher Hsing, Nick Matthews
Odyssey Kayn
Welcome Aboard | Odyssey Animated Trailer - League of Legends (skip to 11s)
Odyssey Kayn Skin Spotlight - League of Legends (skip to 117s)