The Abyss has horrors you couldn't imagine, and there are more every day. Wrex will never tire of finding new things and ways and places to kill demons. Besides, could you offer him a chance to kill Demogorgon? I thought not, as he exists in the reality you intend to destroy.
AAAAAAAARRRRRRGGGGGHHHHHARBLARBLE ASSUMPTIONS FFFFFFFFFFFFFFFFFUUUUUUUUUUUUUUU-
Don't assume anyhting, dude. Just because I intend to destroy reality does not mean that I can't create a small infinity. Besides, the Abyss is something I shat out when I was a baby.
Oh, please. If you were that powerful the lichette would no longer be around due to you killing her.
Even if you did create a Demogorgon, it wouldn't be Demogorgon, the demon who bit and tentacled his way up the ranks of the Abyss to be the most powerful of demon lords. It would be a demon made by Xantalos which happens to have tentacles and two heads.
And the Abyss is not merely infinite, it is an infinite number of infinities. And they all have portals to Layer 1, which has portals everywhere. And everything possible is there, things I haven't thought of, things you haven't thought of, things you will never think of, things you cannot think of.
I've already accepted Xantalo's offer, I do believe. Plus, everywhere is a paradise of murder!
I'll double it. Say...immortality, perhaps? A magical weapon? Some sort of Aperture Science product? Name your price. Oh, and this is n top if as long as you can live, murdering all sorts of beings.