There's a lot of ideas even have a ghost shell look like a mask, the Armor sets would like Tahu, Gali, Kopaka, Pohatu, Lewa, Onua, Takanuva, Makuta, I got no ideas on which classes I got no clues that's up to you guys, the idea for the sparrow would come from the Mask of Light movie where Takanuva travels on a vehicle in the caverns to face makuta that vehicle would be a nice sparrow if you don't know what I'm talking about look up the Bionicle set 8596. Good Idea or Bad Idea.