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Rules guide · Legendary Creature

Koma, Cosmos SerpentHow it works & interactions with other cards

By the ManaCount desk· 3 min read· Murders at Karlov Manor Commander· February 9, 2024
Carte Magic Koma, Cosmos Serpent

Koma, Cosmos Serpent is one of those cards players keep asking about. Here is, in plain words, what its official text says, the rulings published by Wizards of the Coast, and the combos players actually run.

01

Official card text

This spell can't be countered. At the beginning of each upkeep, create a 3/3 blue Serpent creature token named Koma's Coil. Sacrifice another Serpent: Choose one — • Tap target permanent. Its activated abilities can't be activated this turn. • Koma gains indestructible until end of turn.

How it works : Koma, Cosmos Serpent

Original English text — Wizards of the Coast / Scryfall

  1. #1· Wizards of the Coast

    A spell or ability that counters spells can still target Koma, Cosmos Serpent. When that spell or ability resolves, Koma won't be countered, but any additional effects of the countering spell or ability will still happen.

    No other card is named in this ruling.

  2. #2· Wizards of the Coast

    You can't sacrifice Koma itself to activate its last ability, but you can sacrifice any other Serpent you control, including Koma's Coil.

    Card named in this ruling

  3. #3· Wizards of the Coast

    If you choose the first mode of Koma's activated ability, you can choose a permanent that's already tapped as the target. The effect stopping its activated abilities will still apply.

    No other card is named in this ruling.

  4. #4· Wizards of the Coast

    Activated abilities contain a colon and appear in the form "[Cost]: [Effect]." Some keywords such as equip are activated abilities and will have colons in their reminder texts. Loyalty abilities of planeswalkers are also activated abilities.

    No other card is named in this ruling.

  5. #5· Wizards of the Coast

    The first mode of Koma's activated ability doesn't stop static abilities from affecting the game, and it doesn't stop triggered abilities from triggering. Unlike similar effects, it does stop mana abilities from being activated. Most activated abilities that produce mana as they resolve are mana abilities.

    No other card is named in this ruling.

02

Popular combos

Real combos played by the community, sorted by popularity.

Esix, Fractal Bloom
+Timestream Navigator
+Koma, Cosmos Serpent
#1

Esix, Fractal Bloom + Timestream Navigator + Koma, Cosmos Serpent

Infinite turnsLock
  1. 1At the beginning of your upkeep, Koma triggers, creating a copy of Timestream Navigator.
  2. 2Activate the oldest Timestream Navigator, paying {2}{U}{U} and putting Timestream Navigator on the bottom of your library to take an extra turn after this one.
  3. 3Pass the turn.
  4. 4Repeat.

Related cards and tokens

03

Legal formats

historictimelessgladiatorpioneermodernlegacyvintagepennycommanderoathbreakerbrawlcompetitivebrawlduel
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Official source