Corridor Monitor

Artifact Creature — Construct

When this creature enters, untap target artifact or creature you control.

CMC
2
Mana cost
{1}{U}
Color identity
U
Rarity
common
Set
Double Masters
Price
$0.15
EDHREC rank
#8851
Buy on TCGplayer
Corridor Monitor card art
Corridor Monitor enters and untaps any artifact or creature you control — a triggered ability that powers infinite loops faster than most one-drops have any right to. It slots cleanly into Kiki-Jiki, Mirror Breaker combo shells and is an automatic inclusion in Arcum Dagsson decks that need to chain activations in a single turn.

Best Commanders

Commanders with the highest synergy

01
Arcum Dagsson

Arcum Dagsson

61.4% of decks · synergy 0.59

Arcum Dagsson taps to tutor an artifact and put it directly into play — Corridor Monitor untaps him immediately, letting you chain two activations in the same turn and assemble your win condition on the spot.

03
Emry, Lurker of the Loch

Emry, Lurker of the Loch

18.9% of decks · synergy 0.17

Emry, Lurker of the Loch taps to recast artifacts from the graveyard, and Corridor Monitor untaps her mid-chain — critical for any loop that needs Emry active more than once per turn cycle.

Format Analysis

Where it lives, where it can’t

FormatVerdict
commander
legacy
modern
pioneer
standard
vintage
pauper
oathbreaker

Commander is where Corridor Monitor earns its keep: the format's density of tap-to-activate commanders and artifact-centric combo engines gives the Monitor a reliable job every time it lands. In Pauper it sees fringe play in combo shells that need cheap untap effects at common. Modern and Pioneer have access to cleaner combo infrastructure, so the Monitor competes with faster enablers and shows up only in dedicated artifact or flicker builds. Legacy and Vintage can find it, but those formats move too fast for a two-mana 1/3 to matter outside of very narrow Arcum-style toolbox lists.

Key Combos

Combo lines featuring this card

Price Context

Current price

$0.15 bulk tier

At $0.15, Corridor Monitor is firmly bulk — the kind of card you pick up as a throw-in and never think about again. Given its role as a combo piece in multiple popular Commander archetypes, there's no reason to expect price pressure, but there's also no reason to ever pay more than bulk rates for it.

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