>>531988593
I thought a bit of that too and you could also go the route of making a different champion each one of the lunar armour sets. in that case, Velkoz would be a good fit for the Nebula one and his ult could be the Last Prism, Leona could be the Solar Flare with her E being that one spear weapon, her Q being the shield dash a la. shield of cthulhu / solar flare set bonus
I didnt think much further than that but Taliyah could have the Hoverboard as her mount