Thalakos Dreamsower (92)

Tempest Thalakos Dreamsower Creature Thalakos Wizard Shadow (This creature can block or be blocked by only creatures with shadow.)
You may choose not to untap this creature during your untap step.
Whenever this creature deals damage to an opponent, tap target creature. That creature doesn't untap during its controller's untap step for as long as this creature remains tapped. Power: 1 Toughness: 1 Illustrated by Susan Van Camp All Magic: The Gathering (MTG) card images and symbols Wizards of the Coast