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Blue creatures don't untap during their controllers' untap steps. At the beginning of each player's upkeep, that player may choose any number of tapped blue creatures they control and pay {4} for each creature chosen this way. If the player does, untap those creatures.
Abilities, attacks, weakness & resistance
Other cards from Arabian Nights
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Magnetic Mountain (ARN-41) is an Arabian Nights uncommon enchantment. It prevents blue creatures from untapping during their controllers' untap steps and gives each player an upkeep option to pay four mana per chosen tapped blue creature to untap those creatures. Because it alters blue creature uptime, it commonly serves as color-specific disruption in red decks or sideboards.
Catalog pricing data as of 16 Apr 2026, 05:28
