Sorcery, 1U (2)
Common
Creatures target player controls don't untap during that player's next untap step.
The feet have no eyes.
—Saprazzan saying
Illus. Kev Walker

10/4/2004: The creatures are only prevented from untapping during the targeted player's next untap step. They can still can untap during other player's untap steps.
8/1/2008: No creature controlled by the player will untap during his or her next untap step. This includes creatures which entered the battlefield after Misstep resolved.
Legal in Vintage (Type 1)
Legal in Legacy (Type 1.5)
Legal in Commander