In Magic a drawback can be built into an advantage. Like most demons in Magic, Malfegore comes with a price this time at the cost of your hand, however with abilities like Madness and recursion building a deck that uses this discard as an advantage turns Malfegore into a 6/6 flyer for 6 that wipes the field with no draw backs.
Dark suspicions plays well after Malfegore and punishes opponents who rely too heavily on draw mechanics. Wizards has kept good at not rewarding self induced discard too heavily in Magic’s history as it has the chance to destroy certain cost scenarios, so cards like Dark Suspicions are seldom.
Malfegore decks have a time where they peak, as top decking and graveyard play can only get you so far. Spreading Plague can be a massive top deck at the right moment locking down your opponents boards. On a table full of black every creature is a removal spell and though that includes your opponents creatures unlike them you’ve got a 6/6 flying commander with an easy haste trick.
Dragon Breath is a card that ensures you will always get instant value out of Mal. Not only have you cleared their field but now you’re swinging with a firebreathing 6 in the air. Note that even if you have to pay a higher cost for Mal his converted manacost will always be 6.
Sire of Insanity and Blood Scrivener are both cards that pushed Malfegore out of a concept deck and a living monster at my table. Both synergies to such great effect that I can’t help but wonder if someone at Wizards made these cards with the intent of buffing their own Mal build.
Let’s dance !!