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Magus of the Coffers

Creature — Human Wizard

{2}, {T}: Add {B} for each Swamp you control.

CMC
5
Mana cost
{4}{B}
Color identity
B
Rarity
rare
Set
Planar Chaos
Price
$6.56
EDHREC rank
#5301
Buy on TCGplayer
Magus of the Coffers card art
Magus of the Coffers turns a Swamp-heavy board into a mana engine that can flood the table with resources in a single activation — the cost is the six-mana setup and the creature type, which makes it a removal magnet before you untap. Pair it with Staff of Domination and enough Swamps and the game ends on the spot; even without the combo, it routinely produces double-digit mana in mono-black shells. Phage the Untouchable decks run it at over 55% inclusion because the mana demand is real and Magus delivers.

Best Commanders

Commanders with the highest synergy

01
Phage the Untouchable

Phage the Untouchable

55.3% of decks · synergy 0.49

Phage the Untouchable demands a reliable way to cast and protect an eight-mana legendary creature, and Magus of the Coffers is the engine that makes those mana numbers feel attainable — over half of all Phage decks include it for exactly that reason.

02
Valgavoth, Terror Eater

Valgavoth, Terror Eater

30.7% of decks · synergy 0.24

Valgavoth, Terror Eater scales on opponents spending life, which rewards going long, and Magus of the Coffers gives the deck the late-game mana to cast threats off of that accumulated advantage without slowing down.

03
Toshiro Umezawa

Toshiro Umezawa

30.5% of decks · synergy 0.24

Toshiro Umezawa wants instant-speed removal firing every turn, which burns through mana fast — Magus of the Coffers refills the pool each turn cycle so Toshiro can keep the kill-spell chain going without stalling.

04
Acererak the Archlich

Acererak the Archlich

19.0% of decks · synergy 0.12

Acererak the Archlich bounces itself repeatedly to complete dungeons, which requires paying its commander tax over and over — Magus of the Coffers absorbs that cost by converting a Swamp-heavy board into enough mana to replay Acererak multiple times a turn.

05
Maralen of the Mornsong

Maralen of the Mornsong

17.7% of decks · synergy 0.11

Maralen of the Mornsong locks opponents out of draws while tutoring each upkeep, but the three-life-per-search clock means you need to win fast — Magus of the Coffers provides the burst mana to capitalize on the tutors and close before the life loss adds up.

Format Analysis

Where it lives, where it can’t

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

Commander is the format where Magus of the Coffers earns its slot without qualification — mono-black and black-heavy decks in the 99-card format routinely assemble ten or more Swamps, and a single tap can produce the kind of mana that wins games. It's legal in Legacy and Vintage but sees essentially no play there; those formats move too fast for a six-mana creature that needs to survive a full turn cycle before generating value. Modern is a theoretical home but the same problem applies — the mana it produces is spectacular, but a 1/1 for six rarely survives to untap in a competitive environment. Oathbreaker is the one non-Commander 60-card-adjacent format where it can shine, specifically as the signature spell target for black Planeswalker commanders that want to dump mana into activated abilities.

Key Combos

Combo lines featuring this card

1,036 decks
Magus of the CoffersStaff of Domination

Magus of the CoffersStaff of Domination

Infinite black mana; Infinite lifegain triggers; Infinite lifegain; Infinite card draw; Infinite untap of creatures you control; Infinite draw triggers; Infinite mana creatures you control can produce

View on Commander Spellbook ↗

Budget Alternatives

Cheaper options that do most of the same work

Cabal Stronghold covers the same Swamp-counting mana production at under $1 and dodges creature removal entirely, though it requires basic Swamps specifically and doesn't tap for colored mana outside its own ability. Nirkana Revenant doubles black mana from Swamps as a triggered ability rather than an activated one, which is harder to disrupt but costs more to cast than Magus of the Coffers and carries a higher price tag — it's a lateral move rather than a strict budget swap.

Price Context

Current price

$6.56 mid tier

At $6.56, Magus of the Coffers sits in the mid tier — expensive enough to feel like a deliberate inclusion but cheap enough that any mono-black deck with combo ambitions should just run it. The price is stable given its consistent demand across Phage, Maralen, and general mono-black shells; there's no reason to expect it to cheapen significantly.

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Sources

Mentioned

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