*Name: Paralyze
Type: Enchant Creature
Play Cost: 1 Swamp
Game Text: Target creature is not untapped as normal during untap phase unless 4 mana are spent. Tap target creature when Paralyze is cast.
*Source: Front of card
*Name: Paralyze
Type: Enchantment - Aura
Play Cost: 1 Swamp
Game Text: Enchant creature
When Paralyze enters the battlefield, tap enchanted creature.
Enchanted creature doesn't untap during its controller's untap step.
At the beginning of the upkeep of enchanted creature's controller, that player may pay 4. If he or she does, untap the creature.
*Source: gatherer.wizards.com