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

5-card combo · BRG

Verdict

Yes — this 5-card loop generates infinite colored mana and infinite storm count by chaining Dark Ritual through Eternal Witness and The Cauldron of Eternity.

Cards required

Cheapest stack total

$6.49

Color identity

BRG

Popularity

0 decks

Format

Commander

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Phyrexian Altar sacrifices Eternal Witness for one mana; The Cauldron of Eternity routes her straight to the bottom of the library on death, and Grenzo's 2-mana activation flips her back onto the battlefield so she can return Dark Ritual to hand and reset the loop. The whole line requires Grenzo at power 2 or greater and all five pieces in play, which makes it a deliberate setup rather than an accidental pile — expect the table to see it coming once Grenzo and Cauldron hit the battlefield together.

How it works

Prerequisites

Grenzo has power 2 or greater.

Steps

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

Reassembling Skeleton replaces Eternal Witness if the goal is pure infinite mana rather than spell recursion, cutting one card and removing the Dark Ritual dependency entirely in favor of a self-recurring creature. Once mana goes infinite, Grenzo's activated ability mills through the entire library — Walking Ballista or Torment of Hailfire closes the game immediately from that position.

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

How it works

Cheaper, tighter, alternate lines

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