I'm having a bit of a writers block and I need an idea for how to reveal someone's powers

I already have Grian, Ren, Cub and Iskall

Xisuma, Hypno and Bdubs are gonna be explained in the AU itself

Pls the first page is the list of powers of each hermit 

(I need ideas for Jevin, Scar, Mumbo, xB, Doc, Impy, Etho, Beef, TFC, Joe, False and Keralis)

I really need ideas

Cya

(Edit: Tango, Zed and Cleo also now have origins)