Attack your opponents with Assassins and execute them with your commander
Otherwise, this is a crystal clear pass
Heck, consider a heavy black control shell with Moment of Craving, Vraskas Contempt, and Gifted Aetherborneach of those cards turns Nightmares Thirst into an Ulcerate with upside, and an Aethersphere Harvester attack upgrades it into Grasp of Darkness
This is, in essence, a sort of reflavour of Morph and Megamorph, and has cards coming in facedown as 2/2 with Ward 2
The contents are pretty similar, too
After looking at the research, we found that most players feel that when opening boosters, they quickly get to a point where commons don't matter (and then eventually get to a similar point with uncommons)