Magnetic Mountain - Arabian Nights - 41

Enchantment

Mana Cost: {1}{R}{R}

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.

Uncommon · Arabian Nights · #41 (ARN)

Illustrated by Susan Van Camp