# 2021 Magic: The Gathering Kaldheim Promos #221s

> The 2021 Koma, Cosmos Serpent foil promo card is a mythic rare legendary creature from the Magic: The Gathering Kaldheim Promos set, featuring a complex upkeep ability and token generation.

Canonical URL: https://supercatch.com/product/magic-the-gathering-kaldheim-promos-koma-cosmos-serpent-221s-foil-promo-mythic-rare

## Identity

- **Year**: 2021
- **Brand**: Magic: The Gathering
- **Set**: Kaldheim Promos
- **Card Number**: 221s
- **Featured**: Koma, Cosmos Serpent
- **Game**: Magic: The Gathering
- **Rarity**: Mythic Rare
- **Mana cost**: {3}{G}{G}{U}{U}
- **Type**: Legendary Creature — Serpent
- **Power / Toughness**: 6 / 6
- **Color**: G, U
- **Language**: English
- **Material**: Card Stock
- **Finish**: Foil

## Description

The Koma, Cosmos Serpent foil promo card (card number 221s) is a distinctive entry in the 2021 Magic: The Gathering Kaldheim Promos set. As a mythic rare legendary creature of the Serpent subtype, this card commands attention in any collection due to its high mana cost of {3}{G}{U}{U} and its powerful seven-mana value. Designed by Jesper Ejsing, the card offers a sophisticated gameplay experience that rewards strategic planning and resource management.

Koma, Cosmos Serpent provides a potent effect at the beginning of each upkeep, creating a 3/3 blue Serpent creature token known as Koma's Coil. This continuous token generation allows players to build board presence over time. The card also features a versatile activated ability that requires sacrificing another Serpent to choose between tapping a target permanent or granting Koma indestructible until end of turn. This flexibility makes it a valuable asset in various strategic situations within the game.

The foil treatment on this promo card highlights its status as a special release, appealing to collectors who appreciate the aesthetic quality of foil finishes in Magic: The Gathering. The card's design and mechanics reflect the intricate world-building of the Kaldheim plane, offering both visual and gameplay depth. Koma, Cosmos Serpent is a Mythic Rare Legendary Creature — Serpent from the 2021 Kaldheim Promos set.

The card features a foil finish and carries the mana cost {3}{G}{G}{U}{U}. Its unique abilities and mythic rare status make it a sought-after item for enthusiasts of the game.

## FAQ

### What are the stats of Koma, Cosmos Serpent?

Koma, Cosmos Serpent is a Legendary Creature — Serpent with a mana cost of {3}{G}{U}{U}, a mana value of 7, and power/toughness of 6/6. It is colored green and blue.

### What is the main ability of Koma, Cosmos Serpent?

At the beginning of each upkeep, Koma creates a 3/3 blue Serpent creature token named Koma's Coil. It also has an activated ability that lets you sacrifice another Serpent to either tap a permanent or give Koma indestructible until end of turn.

### Is Koma, Cosmos Serpent a foil card?

The foil treatment is a named variant of this promo card.

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Editorial content updated: 2026-10-06.

Site deployment: 2025-11-29.