Yasuo Moses skin
So this came as an idea not from Yasuo but from looking at Nami. Basically we have this one champ (Nami) who sends out a huge wave as her ult, and this other champion who tosses out a whirlwind. It seems like if you turned Yasuo's sword into a crook (walking stick type deal), gave him a beard and some robes he could look a lot like Moses. Thats kind've a boring skin so why make it, and whats the reference to the Nami ult? Imagine if this skin and Nami had a unique interaction whereby tossing Yasuo's whirlwind through the middle of Nami's wave caused it to part like the red sea. This could be done regardless of if Nami and Yasuo are on the same team or not. The wave would not lose size, it would just become two separate but smaller waves.