POST DRAGON'S MAZE

Dragon's Maze spoilers have gotten the best of me and after seeing Master of Cruelties (http://media.wizards.com/images/magic/tcg/products/dgm/tiwoirwiixix/7isqwv12oz_EN.jpg), I had to make a deck that fit him in. This is what I've came up with.

Malfegor .=> Master of Cruelties

(MAYBE) Sign in Blood => Toil & Trouble

As of right now, the primary win conditions are 2 Master of Cruelties, and 1 Griselbrand, though it's definitely possible to win by swinging with Desecration Demon, launching a large Rakdos's Return off, or even letting Olivia get out of hand.

Sideboard is mainly to deal with other control decks. Underworld Connections comes in for more card draw against slow decks. Rakdos Charm comes in against reanimator (or Door to Nothingness if that's a thing). Dreadbore comes in for more removal, and specifically planeswalker threats. Duress is just Duress. If I could fit a third one in, I would probably take it. Extra mutilates for hyper aggro setups. An extra Rakdos's Return and Slaughter Games both for dealing with control threats.

All suggestions welcome!