In Game Description
One of the special rings granted to the four knights of Gwyn.
The wolf ring belongs to Artorias the Abysswalker.
Artorias had an unbendable will of steel,
and was unmatched with a greatsword.
Adds 40 Poise
Found in a secret area of the Darkroot Garden.
To the right of the bonfire and Crest of Artorias door, head right into a new area where you see a sleeping Giant Stone Knight. Attack the green tree to your right and follow the secret path. The ring is at the end of a tunnel to the right of a stone pillar, guarded by two Stone Knights who will pincer attack unless the second knight is killed before you enter the tunnel.