Eerie Ultimatum + Mitotic Slime + Phyrexian Altar + Eternal Witness

4-card combo · WBG

Verdict

Yes — this 4-card loop produces infinite mana, infinite tokens, and infinite storm count in any Abzan shell willing to run a 7-mana sorcery as the engine.

Cards required: 4
Cheapest stack total: $64.06
Color identity: WBG
Popularity: 6 decks
Format: Commander

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Each cycle sacrifices Mitotic Slime and Eternal Witness to Phyrexian Altar, letting Mitotic Slime's death cascade into eight Ooze tokens that collectively fund the full cost of Eerie Ultimatum. Eternal Witness re-grabs Eerie Ultimatum on entry, resetting the loop — the combo is self-contained once all four pieces are on the battlefield.

Recipe

How it works

Prerequisites

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Steps

Activate Phyrexian Altar twice by sacrificing Mitotic Slime and Eternal Witness, adding .
When Mitotic Slime dies, it triggers, creating two 2/2 Ooze creature tokens.
Activate Phyrexian Altar twice by sacrificing the Oozes, adding .
When the Oozes die, they trigger, creating four 1/1 Ooze creature tokens.
Activate Phyrexian Altar three times by sacrificing three Oozes, adding .
Cast Eerie Ultimatum by paying , returning Eternal Witness and Mitotic Slime to the battlefield from your graveyard.
When Eternal Witness enters the battlefield, it triggers, returning Eerie Ultimatum from your graveyard to your hand.
Repeat.

Result

Infinite colored mana; Infinite creature tokens; Infinite death triggers; Infinite ETB; Infinite LTB; Infinite magecraft triggers; Infinite sacrifice triggers; Infinite storm count

Variations

Cheaper, tighter, alternate lines

Eerie Ultimatum is non-negotiable here; nothing else reanimates both creatures at instant-or-sorcery parity for the same mana. The loop generates infinite storm count but no direct kill — add Altar of the Brood to mill the table on every Eerie Ultimatum cast, or drain out with Blood Artist off the infinite death triggers; without one of those, the engine stalls at infinite tokens.