Ultimate skin idea.

An ultimate skin for a champion that uses many active items, and when you're wearing that skin it also reskins every item effect for the items you buy. Let's just say it was a Zaun themed ultimate skin. Then Zz'Rot would pop out toxic bugs and banshees would be a green melting shield.

Not sure what champion this would be good on though, I would say Janna or Heim but we already have a mid lane and support ultimate skin (or 2 support ones arguably) not only that, but Heim is out of meta all the time. Either way, just a thought I had like 3 minutes ago.