Frost Master

{2}{u} Tap target creature an opponent controls.
That creature doesn't untap during its
controller's next untap step. Play this as a
sorcery and no more than once a round.
Their personalities are all a little cold, antisocial, and
eccentric. Yet, Having an "Iceman" in town to
handle, say, a Dragon, Vampire, or Wurm attacks is
priceless. Dwarf holds compete with how comfortable
a living and pleasant a bride they can provide for the
otherwise hermitous scholars." - Reveka