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Koma, Cosmos Serpent Kaldheim Promos #221 Magic: The Gathering card
Mythic

Koma, Cosmos Serpent Kaldheim Promos #221 (Prerelease Stamp)

Card #221 · Prerelease Stamp version · Illustrated by Jesper Ejsing · Green / Blue Colour
Market value · ungraded
$17.11
▼ 1.9% · 30d
PSA 10
$47
3× raw
Blended from live market data · graded from real sold data
Confidence high · estimate, not an appraisal · How we price →
Buy from here
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Koma, Cosmos Serpent is a Mythic Magic: The Gathering card from Kaldheim Promos (#221), illustrated by Jesper Ejsing. Its current blended market value is $17.11 ungraded, with a PSA 10 worth around $47. Prices update from real market data.

Graded prices
Ungraded (raw)$17.11
PSA graded price estimates by grade
GradeRelative valuePrice
PSA 10$47$47–$47
“Sold” = median of real recent sold listings at that grade (eBay or Fanatics Collect — hover a badge to see which). Other figures are blended marketplace estimates. Confidence reflects source backing and price spread — not PSA-official values.

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Price history · Raw

1 Oct 202121 Aug 2026
Latest
$17.11
Period high
$17.45
Period low
$3.00
Change
▲ 80.1%
Available to buy nowLive on eBay

Card details

Set
Kaldheim Promos
Number
#221
Rarity
Mythic
Illustrator
Jesper Ejsing
Colour
Green / Blue
Game
Magic: The Gathering

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Where to buy & check prices

Check recent sold prices
eBay sold

Frequently asked questions

How much is Koma, Cosmos Serpent worth?

Koma, Cosmos Serpent (Kaldheim Promos #221) is worth around $17.11 ungraded, or about $47 in PSA 10, based on live Magic: The Gathering market data.

What is a PSA 10 Koma, Cosmos Serpent worth?

A PSA 10 Koma, Cosmos Serpent sells for around $47, roughly 3× the ungraded price.

Where can I buy Koma, Cosmos Serpent?

You can buy Koma, Cosmos Serpent on TCGplayer, Cardmarket and eBay — see the live listings on this page. Always compare against the blended market value first.

What rarity is Koma, Cosmos Serpent?

Koma, Cosmos Serpent is a Mythic Magic: The Gathering card from the Kaldheim Promos set, illustrated by Jesper Ejsing.

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Free to use with attribution to CardTrack.

Citation
Koma, Cosmos Serpent (Kaldheim Promos #221) — Magic: The Gathering market value $17.11, PSA 10 $47.10. Source: CardTrack, https://cardtrack.com/magic/card/kaldheim-promos/koma-cosmos-serpent-221
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<iframe src="https://cardtrack.com/embed/card?id=PKHM-221p" width="100%" height="160" style="border:0;max-width:460px" title="Koma, Cosmos Serpent price — CardTrack" loading="lazy"></iframe> <p style="font:12px system-ui">Source: <a href="https://cardtrack.com">CardTrack</a></p>