Throne of Thorns
Ring of Swarming Stabs
Twice per day, when the wearer is flanking an opponent, he can as a swift action deal an additional 1d6 points of damage on a successful melee attack against that opponent. This is a sneak attack for any effects that reduce or negate such damage.
This ring is crafted of hardened leather strips, into which bits of fur, feathers, bone, and ivory have been woven.