Great Wolf, Sif

Great Wolf, Sif cost {2} less to cast if you have a creature called Knight Artorias, of the Abyss in
your graveyard.
Intimidate, vigilance
{3}{w}{b}, Search your library for a card named
Knight Artorias, of the Abyss, reveal it, and put
it in your hand.
Some sacrifices are just too great a cost.