Honestly, I would love to see Kas face when that happens.
Kas "I expected better from you, but you can't always get what you want, I'll be taking your soul now don't worry, momma Kas will be gentle."
Champion - Moaning and gasping, asking to be fucked harder, after an hour or more finally cums out their soul.
Kas - "What the fuck is this thing? It's not a soul it-it's some kind of cheap fucking copy." Look of anger mixed with confusion.
Champion - Then starts to service Kas, looking up with eyes filled with devotion.