Geometer's Arthropod card art

Geometer's Arthropod

Creature — Fractal Crab MV 2

Tracked across real Commander games played through TurnZero HQ.

Buy on TCGplayer Track your own decks
Jump to section ▾
What it doesRulingsIn the 99Every version

What it does

Whenever you cast a spell with X in its mana cost, look at the top X cards of your library. Put one of them into your hand and the rest on the bottom of your library in a random order.

Rulings

2 official rulings, in the order Wizards published them.

  • 2026-03-20

    In some rare cases, the value of X for the spell on the stack may be different than the value that was chosen when you cast it. For example, if you control Unbound Flourishing (an enchantment with "Whenever you cast a permanent spell with a mana cost that contains {X}, double the value of X.") the value of X may have been doubled. In those cases, use the value of X as the spell exists on the stack at the time Geometer's Arthropod's ability resolves to determine the value of X for Geometer's Arthropod's ability.

  • 2026-03-20

    Geometer's Arthropod's ability resolves before the spell that caused it to trigger. It resolves even if that spell is countered or otherwise leaves the stack without resolving. In that case, use the value of X as that spell last existed on the stack to determine the value of X for Geometer's Arthropod's ability.

Rulings are Wizards of the Coast's own, mirrored from Scryfall and refreshed nightly.

In the 99

Every deck whose current list includes Geometer's Arthropod, whatever its commander.

Decks running it 3
Games played 0
Win rate — Fewer than 5 completed games — not enough to publish a rate yet.
Confirmed on board 0 Games where a board photo caught it actually in play.

Most played under

Commander Decks Games Win rate
Zaxara, the Exemplary 1 0 —
Zimone, Infinite Analyst 1 0 —

Colors it shows up in

  • Sultai 1 deck
  • Simic 1 deck

Every version of Geometer's Arthropod

3 printings, newest first. Prices are the market figures Scryfall publishes, refreshed nightly — a printing with no figure shows a dash rather than a zero, because Scryfall genuinely publishes none for some of them.

Prices from Scryfall, which tracks the TCGplayer and Cardmarket markets. They move daily and are a guide rather than a quote. Search TCGplayer for Geometer's Arthropod — a name search across every version, for the printings TCGplayer publishes no direct link to.

Aggregated from Commander games tracked in TurnZero HQ. Every figure counts decks and games only — no individual deck list, player or playgroup is identified. Win rates are withheld below 5 completed games, where the sample is too small to mean anything.