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Galvanic Key

Artifact

Flash
{3}, {T}: Untap target artifact.

CMC
2
Mana cost
{2}
Color identity
C
Rarity
common
Set
Mirrodin
Price
$0.15
EDHREC rank
#19312
Buy on TCGplayer
Galvanic Key card art
Galvanic Key untaps any artifact for two mana — straightforward effect, low ceiling on rate, but the combos are real. Rings of Brighthearth turns a single activation into two untaps, which is where this card stops being filler and starts being a win condition.

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 legal
oathbreaker legal

Galvanic Key sees virtually no play in Legacy, Vintage, or Modern despite being legal — the competition for two-mana artifact untappers is stiff, and dedicated combo decks in those formats have faster, more compact lines. Pauper is the only non-Commander format where it occasionally surfaces, in artifact-storm shells that can chain untaps at common. Commander is where Galvanic Key actually earns its slot: artifact-heavy decks are common, the game is slow enough to set up multi-piece synergies, and the card's combo ceiling with mana rocks and activated abilities gets fully exploited across four-player tables.

Key Combos

Combo lines featuring this card

Price Context

Current price

$0.15 bulk tier

At $0.15, Galvanic Key is deep bulk — you're picking it out of a common box, not a singles order. That price is stable; demand is narrow enough that no reprint risk or spike is likely to move it either direction.

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Sources

Mentioned

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