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Agrus Kos, Eternal Soldier

Legendary Creature — Spirit Soldier

Vigilance
Whenever Agrus Kos becomes the target of an ability that targets only it, you may pay {1}{R/W}. If you do, copy that ability for each other creature you control that ability could target. Each copy targets a different one of those creatures. ({R/W} can be paid with either {R} or {W}.)

CMC
4
Mana cost
{3}{W}
Color identity
RW
Rarity
rare
Set
Jumpstart 2022
Price
$1.69
EDHREC rank
#11747
Buy on TCGplayer
Agrus Kos, Eternal Soldier card art
Agrus Kos, Eternal Soldier doubles triggered abilities from creatures — a single copy on board turns every one-shot trigger into two, and The Jolly Balloon Man turns that into a combo engine that loops indefinitely. The cost is a five-mana legendary with no built-in protection, so it lives or dies by how fast it can be recurred or shielded.

Best Commanders

Commanders with the highest synergy

01
The Jolly Balloon Man

The Jolly Balloon Man

31.9% of decks · synergy 0.30

The Jolly Balloon Man's ability triggers whenever a creature with flying, haste, or trample enters — Agrus Kos, Eternal Soldier doubles those triggers, letting a single creature entry generate two bounces and cascade the loop into infinite mana or damage depending on the support package.

Format Analysis

Where it lives, where it can’t

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

Commander is where Agrus Kos, Eternal Soldier actually lives: the singleton format means one copy of a doubling effect is all you need, and the recursion tools in Boros white give it legs after removal. Legacy and Vintage allow it, but five mana for a non-interactive creature is nowhere near the power threshold those formats demand. Oathbreaker is the only other format worth mentioning — as a signature spell target or in a value shell, the doubling effect scales well when games are shorter and boards are smaller.

Key Combos

Combo lines featuring this card

38 decks
Agrus Kos, Eternal SoldierJaxis, the TroublemakerSoulbright FlamekinVillage Bell-Ringer

Agrus Kos, Eternal SoldierJaxis, the TroublemakerSoulbright FlamekinVillage Bell-Ringer

Infinite draw triggers; Infinite rummaging; Infinite self-discard triggers; Near-infinite ETB; Near-infinite LTB; Near-infinite death triggers; Near-infinite sacrifice triggers; Near-infinite creature tokens with haste; Near-infinite red mana; Near-infinite untap of creatures you control; Near-infinite mana creatures you control can produce

View on Commander Spellbook ↗

Price Context

Current price

$1.69 cheap tier

At $1.69, Agrus Kos, Eternal Soldier sits in the bulk-rare tier — cheap enough that picking up copies is a non-decision if you're building The Jolly Balloon Man. Demand is narrow but real, so the price is unlikely to crater further and could tick up if combo decks featuring it gain more traction.

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Sources

Mentioned

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