Effect Veiler

Channel —{1}, Discard Effect Veiler: Counter
target activated or triggered ability an opponent controls.
Tune —Sacrifice Effect Veiler and a non-Tuner
creature you control: Search your library for a
colorless creature card with mana value X,
where X is the total mana value of the sacrificed
creatures. Put that card onto the battlefield. It
gains haste until end of turn.