Corridor Monitor
Artifact Creature — Construct
When this creature enters, untap target artifact or creature you control.
- CMC
- 2
- Mana cost
- Color identity
- U
- Rarity
- common
- Set
- Double Masters
- Price
- $0.15
- EDHREC rank
- #8851
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

Arcum Dagsson
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.

Jhoira, Ageless Innovator
Jhoira, Ageless Innovator generates counters by tapping artifacts, and Corridor Monitor untaps her after each cast, collapsing what would take multiple turns into a single explosive line.

Emry, Lurker of the Loch
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
| Format | Verdict |
|---|---|
| commander | legal |
| legacy | legal |
| modern | legal |
| pioneer | legal |
| standard | not legal |
| vintage | legal |
| pauper | legal |
| oathbreaker | legal |
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


Kiki-Jiki, Mirror BreakerCorridor Monitor
Infinite creature tokens with haste; Infinite ETB; Infinite LTB; Infinite sacrifice triggers; Infinite death triggers
View on Commander Spellbook ↗



Emry, Lurker of the LochDisplacer KittenCorridor MonitorLotus Petal
Infinite LTB; Infinite ETB; Infinite colored mana; Infinite storm count
View on Commander Spellbook ↗



Emry, Lurker of the LochDisplacer KittenMishra's BaubleCorridor Monitor
Infinite LTB; Infinite ETB; Infinite storm count; Infinite card draw at the beginning of the next upkeep; Infinite draw triggers at the beginning of the next upkeep
View on Commander Spellbook ↗

Splinter TwinCorridor Monitor
Infinite ETB; Infinite creature tokens with haste
View on Commander Spellbook ↗



Emry, Lurker of the LochDisplacer KittenUrza's BaubleCorridor Monitor
Infinite LTB; Infinite ETB; Infinite storm count; Infinite card draw at the beginning of the next upkeep; Infinite draw triggers at the beginning of the next upkeep
View on Commander Spellbook ↗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.
Explore
Sources
Mentioned
Updated . Data from Scryfall, EDHREC, and Commander Spellbook.