The goal here is clearly to get out six Shadowborn Apostles, and to throw an equipment on Shirei, Shizo's Caretaker. This will allow one to reuse the same six Apostles to tutor a new demon on every successive turn, for the low low cost of . That's right, you can also do it on your opponent's turn.
The Apostles:
Six Shadowborn Apostles isn't easy to set up repeatedly, and one demon just isn't enough for me. so the goal is to get six Apostles out, and reuse them.
Commander:
Shirei, Shizo's Caretaker: If Shirei is out when sacrificing your Apostles, they will be returned to the battlefield during your end step. That is, IF Shirei is still alive. At only two toughness we need a way to keep her safe.
Protection:
Champion's Helm
Cloak and Dagger
General's Kabuto
Lightning Greaves
Mask of Avacyn
Swiftfoot Boots
Whispersilk Cloak
These should keep Shirei out of harms way. Hell, she might even get in there and do some damage.
Removal:
Dark Banishing
Doom Blade
Ghastly Demise
Go for the Throat
Hero's Downfall
Malicious Affliction
Murder
Slaughter Pact
Tragic Slip
Flesh Allergy
Loads of targeted removal, in addition to some sacrifices from a few of the demons.
The Demons:
Each demon has its own interactions in this deck.
Abhorrent Overlord won't come out very often, because most of your devotion to black will be gone (temporarily), but if you have the devotion, he can pack a punch.
Demon of Death's Gate
is one of the go-to fatties in the deck.
Demon of Wailing Agonies
is usually a 6/6 with a sacrifice trigger when he hits.
Eater of Hope is recurring targeted removal that hits for six in the air.
Harvester of Souls is a superstar in this deck. Every time you fetch a demon you draw six cards. Any time you kill a creature or they sac a creature, draw.
Indulgent Tormentor is even more card advantage.
Lord of the Void another fatty that nets you creatures.
Ob Nixilis, the Fallen if played correctly, he can deal six damage before ever attacking, then swing for nine, then three more damage, then swing for twelve, then three more...
Ob Nixilis, Unshackled every time you tutor a demon, he gets six counters.
Rune-Scarred Demon can tutor for anything. whats better than a fatty? a fatty and a Whispersilk Cloak/
Flesh Allergy
/Grave Pact/Swamp.
Spirit of the Night
has everything you could need.
Misc:
Skirsdag High Priest is here to make free demons.
Grave Pact every time you tutor a demon, they have to sac six creatures.
As of now, the deck takes a few turns to get going, but boy does she fly when she ready. The usual line of play is is to first tutor for Rune-Scarred Demon to grab Grave Pact. Then next turn tutor for Harvester of Souls, forcing them to sac six to Grave Pact. Now when you tutor for your next demon you draw six cards and they sac six creatures. If Shirei, Shizo's Caretaker is not equipped, then Rune-Scarred Demon should be used to find one. preferably General's Kabuto or Champion's Helm.