Grenzo, Dungeon Warden + The Cauldron of Eternity + Phyrexian Altar + Dark Ritual + Warden of the Eye

5-card combo · WUBR

Verdict

Yes — this 5-card loop generates infinite colored mana and infinite ETB/death triggers in any Grenzo shell that runs The Cauldron of Eternity.

Cards required

Cheapest stack total

$5.83

Color identity

WUBR

Popularity

0 decks

Format

Commander

Buy required cards on TCGplayer

Phyrexian Altar converts Warden of the Eye into one mana; The Cauldron of Eternity immediately queues it back to the bottom of the library; Grenzo, Dungeon Warden flips it back into play for 2, and Warden of the Eye's ETB returns Dark Ritual to hand to fund the next loop. The engine requires Grenzo to have power 2 or greater — a prerequisite Grenzo decks trivially meet by paying into his activated ability at cast — and the whole package sits in Grixis-plus color identity, most naturally under a WUBR commander like Breya, Etherium Shaper or Atraxa if Grenzo isn't the commander.

How it works

Prerequisites

Grenzo has power 2 or greater.

Steps

Cast Dark Ritual by paying , adding .
Activate Phyrexian Altar by sacrificing Warden of the Eye, adding one mana of any color.
When Warden of the Eye dies, The Cauldron of Eternity triggers, putting Warden of the Eye from your graveyard onto the bottom of your library.
Activate Grenzo by paying , putting Warden of the Eye from the bottom of your library into your graveyard, and then putting it onto the battlefield.
When Warden of the Eye 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

Naban, Dean of Iteration doubles Warden of the Eye's ETB trigger and can substitute redundant card-return if Dark Ritual is unavailable. Once mana goes infinite, Grenzo's activated ability fires at will to dump the library onto the battlefield — Walking Ballista or Bitter Ordeal closes the game cleanly, and the storm count alone makes Tendrils of Agony a live option in black.

Grenzo, Dungeon Warden + The Cauldron of Eternity + Phyrexian Altar + Dark Ritual + Warden of the Eye

How it works

Cheaper, tighter, alternate lines

Other combos sharing these cards