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Geometer's Arthropod
RareColour IDMV 2
Creature — Fractal Crab
Whenever you cast a spell with 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.
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Card capabilities
Creature
Derived deterministically from card types, Oracle text and keywords. Not a strategic evaluation.
Format legality
Primary formats
Eternal formats
Other printings
2 other English printingsEarliest 2026-04-24Newest 2026-04-24Cheapest priced $0.45 in PSOS
Rulings (2)
wotc20 Mar 2026
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.
wotc20 Mar 2026
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.
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Ranked by shared capabilities, colour identity, mana value and type — never by strategic judgement.
