FGM Reverse Resource
Would take Riot a little while to balance but being a feature mode they could just do a rough balance. But essentially make all mana champs energy based (or health/heat/rage) where it fits and vice verse.
Could be extremely interesting to see champs like Renec, Zed, etc being mana gated then seeing others like Nasas and Lucian going off energy. Or seeing Mundo and Ryse being flipped.
What do you think?