Basically the avatar but not at the same time
Champion kit
So, I imagined a champion that had a kit that was almost like if elementals lux had become a separate champion. The Q would be a basic skill shot dealing damage with AP (around 30-50%) and base damage of 100/150/200/250/300 and would have a secondary effect based on element, fire is a red buff burn, air has an affect similar to Yasuo's steel tempest tornado that knocks up one enemy, earth is a small shield, and water is a minor heal, this is pretty strong, but it has low damage. W is just an element rotation, after a 2.5 second channel with a 45/40/35/30/20 cooldown, and selecting the element would be like Twisted Fate's "Pick a card" so it wouldn't be super easy to quickly change the desired element. E would be the main damage ability which is an AoE affect, similar to Lisandra's W without the stun, which has different effects based on element, Fire is like a empowered Karma Q, Water is a healing circle for allies, Air is a Janna R without the healing and in a much smaller range, and finally, Earth is a Taliyah W that deals less damage but has a stronger slow. Finally, R lowers all ability cooldowns and sets the champion in "Elemental overdrive" which increases all stats, mainly CDR and MS, but, the overdrive can be countered by crowd control and has a activity time of 15/20/25.
Apperance I imagined a younger champion (14-16) that was the combination of Yasuo and Taliyah (note: not as broken as Yasuo but like him in his personality ) who had a cape like Taliyah's but changed based on element (Color was red, blue, white, and brown) and at the ends, had aspects of the element like Taliyah's rocks, rock being earth, fire having fire at the end, water has ice, and air giving off a faint breeze. Yasuo's teen angst would be the personality of this character, but have a sarcastic comments just so he isn't a Yasuo clone in personality.
Lore For the time being I'll go by Elem for his name, but that is not my idea for the final name.
Elem was the son of a two merchants, he was born on the path from Bandle city to Noxus, his parents were killed by Noxian assassins (Kat and Talon), were he discovered they were Noxian traitors who had been taught at their military academy, but betrayed once word of the Ionian invasion was spread throughout the academy. Elem ran, were he discovered that he had power, but nothing to channel it and ended up using Mana to attack, which only slowed his pursuers, and gave him time to escape. Elem had spent time learing how to use his power, and slowly discovered he was the host of 4 Hollow spirits, who are able to capture an element and mimic it. the Hollows instructed him to visit every major city, learning different types of magic in each one, Earth in Shurima from a young earth mage
, water in Bilgewater from a strange voice in the sea
, air on his way to Ionia from a swordsman
, and fire from a dragon girl in Demacia
. Now he yerns to discover as many ways to channel his power though all elements and use it to destroy Noxus.