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

5-card combo · UBR

Verdict

Yes — this 5-card loop generates infinite colored mana and infinite ETB/death triggers once Scrivener starts bouncing Dark Ritual back from the grave.

Cards required

Cheapest stack total

$64.86

Color identity

UBR

Popularity

0 decks

Format

Commander

Buy required cards on TCGplayer

The engine is a self-contained loop: sacrifice Scrivener to Phyrexian Altar, The Cauldron of Eternity returns it to the library's bottom, Grenzo flips it onto the battlefield for 2 mana, and Scrivener's ETB trigger recovers Dark Ritual to fund the next iteration. Each loop nets mana and triggers everything that cares about creatures entering or leaving the battlefield. This is a Grenzo, Dungeon Warden deck exclusive — the combo requires Grenzo's activated ability as the engine and his power-2 floor as the gate.

How it works

Prerequisites

Grenzo has power 2 or greater.

Steps

Cast Dark Ritual by paying , adding .
Activate Phyrexian Altar by sacrificing Scrivener, adding one mana of any color.
When Scrivener dies, The Cauldron of Eternity triggers, putting Scrivener from your graveyard onto the bottom of your library.
Activate Grenzo by paying , putting Scrivener from the bottom of your library into your graveyard, and then putting it onto the battlefield.
When Scrivener 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 LTB; Infinite ETB; Infinite colored mana; Infinite sacrifice triggers; Infinite death triggers; Infinite storm count; Infinite magecraft triggers; Put a selection of creature cards from your library onto the battlefield

Cheaper, tighter, alternate lines

Cabal Ritual replaces Dark Ritual in lists that reliably hit threshold, squeezing extra black out of each loop. Archaeomancer covers Scrivener's role identically but is more searchable off Grenzo himself since the two share the same 1 power floor issue — confirm power 2 is met before committing. Once mana is infinite, activate Grenzo repeatedly to put any creature in the library onto the battlefield as the finisher; Walking Ballista or Impact Tremors are the clean kills.

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

How it works

Cheaper, tighter, alternate lines

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