spiritus ex infernis (EDH / Commander)

This is a super-fast monoblack spirit deck that uses Iname, Death Aspect to get all spirits to the graveyard, and then turn around and sacrifice Iname for mana to cast a reanimator spell either directly or to tutor for one. Sorcery speed graveyard removal is to slow to deal with this deck, but continual effects cause it to fold quickly, especially if they are artifact or enchantment based graveyard-exile effects.

Most games with this deck will lead to every opponent scooping, especially if you get the combo in play (in other words if you don't have Kuro and Horobi in hand).

The downside - if someone manages to exile all your spirits, you might as well scoop. You cannot win.

Wincons:
Massive combat damage
Mortal Combat
Gray Merchant of Asphodel after playing every spirit - massive damage
Syr Konrad, the Grim after playing Iname, Death Aspect - massive damage
Tainted strike - one shot someone with an unblocked 9 power

Combos:
Kuro, Pitlord & Horobi, Death's Wail - instant speed destroy all opponent creatures for 1 life each

Mass reanimators:
Haunting Voyage
Living Death
Patriarch's Bidding
Balthor the Defiled
Myojin of Grim Betrayal

Tutors:
Mausoleum Secrets
Beseech the Queen
Brainspoil
Demonic Collusion
Diabolic Intent
Grim Tutor
Illicit Shipment
Profane Tutor

Draw:
Geier Reach Sanitarium
Necrologia
Decree of Pain
Night's Whisper
Sign in Blood
Graveborn Muse
Seizan, Perverter of Truth

Mana acceleration:
Cabal Coffers
Cabal Stronghold
Cabal Ritual
Culling the Weak
Dark Ritual
Sacrifice
Songs of the Damned
Bubbling Muck
Illuminor Szeras
Soldevi Adnate

Mass creature destruction:
Decree of Pain
Living Death
Mutilate