Ashe, the Frost Archer

When Ashe, the Frost Archer enters the
battlefield target opponent reveals his or her
hand. "Ashe sends her Hawk Spirit on a scouting
mission."
Enchanted Crystal Arrow — {s}{s}, {t}: You
choose target creature or a creature card revealed
in your opponent's hand. In both cases, the
creature or creature card becomes unusable by
its controller until your next turn.