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Guardians of Koilos

Artifact Creature — Construct

When this creature enters, you may return another target historic permanent you control to its owner's hand. (Artifacts, legendaries, and Sagas are historic.)

CMC
5
Mana cost
{5}
Color identity
C
Rarity
common
Set
Dominaria
Price
$0.06
EDHREC rank
#22352
Buy on TCGplayer
Guardians of Koilos card art
Guardians of Koilos enters, untaps two artifacts, and immediately enables a second activation of whatever engine you've already built — the payoff is real and on-board the turn it lands. The cost is five mana for a 3/3 with no evasion, which means it earns its slot only in decks that have artifacts worth untapping, and Replication Specialist shells are the clearest home.

Format Analysis

Where it lives, where it can’t

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

Guardians of Koilos is legal in Commander, Legacy, Modern, Pioneer, Vintage, Pauper, and Oathbreaker, but competitive constructed formats have no interest in a five-mana 3/3 whose value is entirely conditional. Commander is where it actually matters — artifact-heavy decks can chain enough value off two untap triggers to justify the slot, and at common rarity it slots into Pauper artifact builds that need tempo without a budget ask. Outside those two formats, leave it on the shelf.

Key Combos

Combo lines featuring this card

Price Context

Current price

$0.06 bulk tier

At $0.06, Guardians of Koilos is deep bulk — you're not buying it for value, you're buying it because it does something specific your deck needs for essentially nothing. Bulk commons don't appreciate, so pick up a copy if it fits and don't think twice about it.

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Sources

Mentioned

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