Hoarmurath, the Ice King

When Hoarmurath, the Ice King enters the battlefield, tap target permanent an opponent controls.
Ringwraith - When Hoarmurath, the Ice King
enters the battlefield, creatures your opponents control don't untap during their controllers next
untap step. (You can only have one Hoarmurath,
the Ice King in your Deck. As long as you control
another Ringwraith, Hoarmurath, the Ice King gains
these abilities.)