Somnophore

Oracle Text

Flying

Whenever Somnophore deals damage to a player, tap target creature that player controls. That creature doesn't untap during its controller's untap step for as long as Somnophore remains on the battlefield.

Card Rulings

10/4/2004 It can end up holding more than one creature tapped.
10/4/2004 You can choose the same creature more than once (for no additional effect).