[Skin Concept] Arcade Master Yi
I personally love the Arcade skin line, so I'm just gonna make a crap ton here since I have a bunch of ideas. Though I'm a terrible artist so I'll just describe the idea.
Arcade Master Yi would be dressed like Arcade Hecarim. He would have the sort of metallic look of Arcade Hecarim, but the suit design of Full Metal Pantheon, minus his helmet, which would essentially be an Oculus Rift(or, basically look like one) with the front as a screen with a few symbols depicting his W and R. The top of his head would also be covered with the sort of metal of Arcade Hecarim. His sword would be just like the default skin, minus the little rings along the edge.
Q - Alpha Strike Alpha Strike would basically be a rainbow flash between several targets, with each target hit getting one symbol of "-1" near their person every time hit.
W - Meditate Meditate would be Master Yi floating in the air, as per usual, with green "+" signs floating around him, as well as a "+1" on his head piece screen, starting empty, then one +1 on the left side when 1/4 through, then another 1/2 through in the middle, then another to fill it out at 3/4, and then it just stops when he's done.
E - Wuju Style Wuju Style would, with the passive up, color his blade a blue, and over time changing to various colors of the rainbow. When active, it would be a full rainbow through the whole sword, going up through it to the tip as it changes. Not quite sure how to explain it, it just starts rainbow through the whole thing and kinda goes like an escalator or something... yeah that works for me.
R - Highlander Highlander would change the current yellow air flow to a rainbow flow, and his head piece would have a flashing "BOOST" in full caps, colored either blue or flowing rainbow as his sword would while Wuju Style is active.
Oh, and as a last note, his voice would also be kinda melded over like all the other Arcade skins(such as Hecarim, how he has the same VO but it sounds kind of mechanical or whatever.