*Name: Magnetic Mountain
Type: Enchantment
Play Cost: 1 Colorless, 2 Mountains
Game Text: Blue creatures do not untap as normal. During their upkeep phases, players must spend 4 for each blue creature they wish to untap. This cost must be paid in addition to any other untap cost a given blue creature may already require.
*Source: Front of card
*Name: Magnetic Mountain
Type: Enchantment
Play Cost: 1 Colorless, 2 Mountains
Game Text: 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 he or she controls and pay 4 for each creature chosen this way. If the player does, untap those creatures.
*Source: gatherer.wizards.com