Color Identity: B

Initial Card State
- All permanents on the battlefield.
Notable Prerequisites
- You control at least one additional nontoken creature.
Steps
- Activate Altar of Dementia four times by sacrificing Cadaver Imp, Shambling Ghast, Pawn of Ulamog and another nontoken creature.
- Pawn of Ulamog and Prowling Geistsnatcher trigger four times each, and Shambling Ghast triggers once.
- Resolve the Shambling Ghast trigger, creating a Treasure token.
- Resolve all Pawn of Ulamog triggers, creating four 0/1 Eldrazi Spawn creature tokens.
- Resolve all Prowling Geistsnatcher triggers, exiling the sacrificed creatures.
- Resolve all Altar of Dementia abilities, causing target player to mill cards equal to the sacrificed creatures' powers.
- Activate Altar of Dementia by sacrificing Prowling Geistsnatcher.
- Prowling Geistsnatcher leaves the battlefield, returning all cards exiled with it to the battlefield.
- Cadaver Imp enters the battlefield, returning Prowling Geistsnatcher from your graveyard to your hand.
- Resolve the Altar of Dementia ability from step 7, causing target player to mill cards equal to Prowling Geistsnatcher's power.
- Activate three Eldrazi Spawn tokens by sacrificing them, adding ({C} magic symbol)
({C} magic symbol)
({C} magic symbol)
. - Activate the Treasure by tapping and sacrificing it, adding ({B} magic symbol)
. - Cast Prowling Geistsnatcher by paying ({3} magic symbol)
({B} magic symbol)
. - Repeat.
Results
- Infinite colorless mana.
- Infinite creature tokens.
- Infinite death triggers.
- Infinite ETB.
- Infinite LTB.
- Infinite mill.
- Infinite sacrifice triggers.
- Infinite self-mill.
- Infinite storm count.
Bracket Tag
This combo has been estimated to be Exhibition (Bracket 1+).