Hey Nintendo625! +1 to Kindlejack's info about Vel'Koz and his hefty contribution to the Arclight thematic lore. The way we try to approach skins nowadays is to fully flesh out what X champ's story is within a given thematic, with the intent to let that then inform design throughout the entirety of the skin from Concept all the way through to VFX and SFX. Ideally we treat the story as sort of a creative North Star. So we started there.
In this thematic, Yorick is essentially a king of a great and prosperous land, and when darkness descends upon his kingdom he is tested by the divine light of VelKoz's gaze. Passing the trial, he gains power and dominion over light, becoming a paladin of the Arclight Order to protect the mortal realm from the dark threat. In doing this, however, he also loses his mortality. Yorick outlives his beloved queen, his children, grandchildren, his kingdom and it's people. In taking on the light he ends up still losing the very thing he vowed to protect with it's powers. The last remaining humanity left in him uses the light to create constructs, monuments to his fallen queen. For flavor, I imagined that the collective vision of the Arclight would skew time, pulling you back out of your linear mortal view of it and replacing it with a harsh birds eye view of everything before and after. The overall idea is that while we were going for a 180 degree turn for the aesthetic of the skin, the story would still be tragic and dramatic.
I appreciate you reading this far, would love to read whatever you come up with. I used to create stories around existing skin thematics and new ideas for skins for hours as a player, and literally never tire of seeing and reading player created content. GG amigo!