Basically it's a hero arena (examples: Heaven vs Hell, Angel Arena, Nexus Arena (My fav but I don't see no more), Anime Fight, etc.)
All the heroes are gonna be some kind of CREEP model, and I'll just make spells off of what they look like they should be able to do. haha sounds lame. I know... I'll take suggestions right here for different heroes of different models. If someone uses one model but you wanted to use that one, go right ahead.