Enchantment — Aura, 2U (3)
Common
Enchant creature
Enchanted creature doesn't untap during its controller's untap step.
"Obviously, the Firemind's mission is worth more than a few goblins."
—Pelener, chamberlain of Niv-Mizzet
Illus. Scott Chou

10/1/2009: Paralyzing Grasp may target, and may enchant, an untapped creature. If it does, it will have no effect unless that creature becomes tapped somehow.
10/1/2012: The enchanted creature can still be untapped by a spell or ability at other times.
Legal in Vintage (Type 1)
Legal in Legacy (Type 1.5)
Legal in Extended (Type 1.X)
Legal in Standard (Type 2)
Legal in Classic (MTGO)
Legal in Commander
Legal in Modern