Game Mode Idea: Raid Boss

This can either be a PvE or a 1vX mode, but I think it'll be pretty interesting to have a select pool of champions, champions who are in-lore big baddies or who would naturally be boss-level enemies in other games (Think: Sion, ASol, Rek'Sai, Galio, Illaoi, Cho, and the like), basically bumped up to Doom Bot Level.

Give their abilities custom effects/make their models bigger to better capture their raid-bossy-ness

What do you think?