Great Grey Wolf Sif

When Great Grey Wolf Sif enters the battlefield, if Artorias the Abysswalker is in your graveyard, you may search your hand, graveyard, and/or library for an equipment card named Greatsword of Artorias and put it onto the battlefield. If you searched your library this way, shuffle it.
Companion if the Wolf Knight, Artorias. After Artorias passed away, Sif became the guardian of Artorias' grave in the Darkroot Garden.