Knight Artorias

Deathtouch, lifelink, menace
Knight Artorias gets +2/+0 and has vigilance as long as you control "Great Grey Wolf Sif".
Discard this card from your hand: Search your library for a card named "Great Grey Wolf Sif", reveal it and put it into your hand then shuffle.
Before he fell to darkness he gave his shield to protect his friend.