What skin would you like to be turned into a skinline?

Hey guys, so we got a lot of skins and skinlines nowadays and some single skin-themes got later turned into a whole skinline, like the PROJECT-skins which started with PROJECT: Yasuo (did you know that it was first called Cyber Ops Yasuo?), before Fiora, Zed, Lucian, Leona and Yi all received one, as well as Ekko, Kata and Ashe now. So as every skin has the chance to be turned into a skinline, what skin-theme do you want to be added on other champs? For me it's Rune Wars. I just love Rune Wars Renekton, the golden armor, the purple runes added onto it and his bluish grey skin looks pretty good too and it also has a connection to the Runeterra-lore. I would love to see how other champs would look when they have fought in the Rune Wars. I guess someone like Aatrox or Riven would fit the skins or give one to Nasus, cause brothers.

Edit: I feel like Volibear would be a perfect candidate for a Rune Wars skin!