How about a elemental series, starting with a Elemental yasuo skin?!!!!
I thought it would be cool to have this like, have the skin kinda go based of avatar, like his moves have fire, wind (obviusly, water and earth. Which could be cool.
His sword on Q will be fire and light up when ever he activates it and hits a target, amd when he throws his tornado its a Mix of the 4 elements. His wind wall can be water that rises up, and there could possibly be a cool affect made when he is in the river. His e can be earth, everytime he passes through a target the earth moves with him and when he e Q the earth rises under all the hit targets. Then his ultimate can have Fire, earth, water and air mixed to it when he slashes the enemy