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Arvinox isn't a creature unless you control three or more permanents you don't own. At the beginning of your end step, exile the bottom card of each opponent's library face down. For as long as those cards remain exiled, you may look at them, you may cast permanent spells from among them, and you may spend mana as though it were mana of any color to cast those spells.
Abilities, attacks, weakness & resistance
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Arvinox, the Mind Flail (SLX-1) is a Legendary Enchantment Creature — Horror from the Universes Within set. It becomes a creature only if you control three or more permanents you don’t own, and at your end step it exiles the bottom card of each opponent’s library face down, letting you look at and cast permanent spells from among them using mana of any color. Its name is treated the same as Mind Flayer, the Shadow for rules and deck-construction purposes, which can affect interactions and legality.
Catalog pricing data as of 19 Apr 2026, 00:06
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