Artorias, Abyss Leader

Double Strike, Fear
Unleash (You may have this creature enter the battlefield with a +1/+1 counter on it. It can't
block as long as it has a +1/+1 counter on it.)
When Artorias, Abyss Leader enters the
battlefield you may search your library for a card
named Sif, The great Grey Wolf and put
that card onto the battlefield then shuffle your
library.