Grenzo, Dungeon Warden + The Cauldron of Eternity + Phyrexian Altar + Dark Ritual + Izzet Chronarch

5-card combo · UBR

Verdict

Yes — this 5-card loop generates infinite colored mana and infinite ETB and death triggers by recycling Izzet Chronarch through Grenzo, Dungeon Warden at the cost of 2 mana per iteration.

Cards required

Cheapest stack total

$61.59

Color identity

UBR

Popularity

0 decks

Format

Commander

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The engine works by sacrificing Izzet Chronarch to Phyrexian Altar, letting The Cauldron of Eternity immediately queue it to the bottom of the library for Grenzo to flip back into play, where it returns Dark Ritual to hand and refunds the loop's mana cost. Grenzo, Dungeon Warden at power 2 is the load-bearing prerequisite — the whole chain collapses if he's been reduced below that threshold by a shrink effect. This lives in Grixis reanimator and aristocrats shells that are already running Grenzo as the commander, where the redundancy between Cauldron, Altar, and cheap rituals is easy to assemble.

How it works

Prerequisites

Grenzo has power 2 or greater.

Steps

Cast Dark Ritual by paying , adding .
Activate Phyrexian Altar by sacrificing Izzet Chronarch, adding one mana of any color.
When Izzet Chronarch dies, The Cauldron of Eternity triggers, putting Izzet Chronarch from your graveyard onto the bottom of your library.
Activate Grenzo by paying , putting Izzet Chronarch from the bottom of your library into your graveyard, and then putting it onto the battlefield.
When Izzet Chronarch enters the battlefield, it triggers, returning Dark Ritual from your graveyard to your hand.
Repeat.
Once you have infinite mana, you may activate Grenzo's ability any number of times.

Result

Infinite colored mana; Infinite death triggers; Infinite ETB; Infinite LTB; Infinite magecraft triggers; Infinite sacrifice triggers; Infinite storm count; Put a selection of creature cards from your library onto the battlefield

Cheaper, tighter, alternate lines

Priest of Gix replaces Dark Ritual as the mana refund if the instant is unavailable, producing three black on ETB directly rather than from hand. Any instant-speed kill outlet sitting in the command zone — Grenzo himself can flip the whole library once mana is infinite — closes the loop, but add Goblin Bombardment or Altar of Dementia if the deck needs an explicit winning move outside the commander.

Grenzo, Dungeon Warden + The Cauldron of Eternity + Phyrexian Altar + Dark Ritual + Izzet Chronarch

How it works

Cheaper, tighter, alternate lines

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