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The Cauldron of Eternity

Legendary Artifact

This spell costs {2} less to cast for each creature card in your graveyard.
Whenever a creature you control dies, put it on the bottom of its owner's library.
{2}{B}, {T}, Pay 2 life: Return target creature card from your graveyard to the battlefield. Activate only as a sorcery.

CMC
12
Mana cost
{10}{B}{B}
Color identity
B
Rarity
mythic
Set
Throne of Eldraine Promos
Price
—
EDHREC rank
#8978
Buy on TCGplayer
The Cauldron of Eternity card art
The Cauldron of Eternity turns your graveyard into a repeating resource — every creature that dies goes back to the bottom of your library, and you get a free reanimate trigger whenever one does, provided you pay two mana. The cost to land it is steep: it enters costing twelve, reduced by two for each creature in all graveyards, which means it's a build-around that rewards dedicated graveyard strategies rather than a splash. Grenzo, Dungeon Warden is the natural home, feeding creatures to the bottom of the library and then pulling them back up for free with Grenzo, Dungeon Warden's activated ability.

Best Commanders

Commanders with the highest synergy

01
Grenzo, Dungeon Warden

Grenzo, Dungeon Warden

58.9% of decks · synergy 0.58

Grenzo, Dungeon Warden's activated ability puts creatures directly onto the battlefield from the bottom of the library, and The Cauldron of Eternity routes dead creatures right back there — the two form a self-sustaining loop that makes every creature in the deck effectively recursive.

02
The Ancient One

The Ancient One

31.9% of decks · synergy 0.31

The Ancient One cares about milling and self-filling the graveyard at scale, which accelerates The Cauldron of Eternity's cost reduction and keeps the board full of creatures to threaten reanimation from.

Format Analysis

Where it lives, where it can’t

FormatVerdict
commander legal
legacy legal
modern legal
pioneer legal
standard not legal
vintage legal
pauper not legal
oathbreaker legal

The Cauldron of Eternity sees essentially zero play in Legacy, Modern, or Pioneer — the formats are too fast and too focused for a twelve-mana artifact that requires a critical mass of dead creatures to even become castable. Commander is where The Cauldron of Eternity actually lives: the longer game, the multiplayer graveyards, and the existence of powerful graveyard commanders all conspire to make the cost reduction reliable and the recursion engine genuinely threatening. In Oathbreaker the card is legal but the format's tighter deck construction and faster clock make it a fringe inclusion at best.

Key Combos

Combo lines featuring this card

Price Context

Current price

unknown tier

Current pricing data for The Cauldron of Eternity isn't available in this snapshot, so check Scryfall or TCGPlayer for the live number before buying. Given its narrow Commander niche and limited competitive relevance, it typically sits in the budget-to-mid range — worth picking up if you're building around it, not worth speculating on.

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Sources

Mentioned

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Updated . Data from Scryfall, EDHREC, and Commander Spellbook.