Dream Tides

Enchantment, 2UU (4)
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 nongreen creatures he or she controls and pay {2} for each creature chosen this way. If the player does, untap those creatures.¹
Illus. Jerry Tiritilli

Gatherer Card Rulings [Nov 2009]

• 2/1/2006: You can only untap nongreen creatures once, since this has a beginning of upkeep triggered ability.

Format Legality	Legal in Vintage, Legacy, MTGO Classic Banned in Extended, Standard
Printings (1/6)	Visions (Uncommon)