Seth's Ring of Shadows

Melee attacks made by the wearer deal +1 damage as Cold

If the wearer is a rogue, in addition to the always-on melee Cold damage bonus, they have a once per game perk. When attempting to make a sneak attack, the rogue has the option to use a Ranged weapon. This ring does not in any way alter the number of times a rogue can attempt to make a sneak attack–it allows one of those attempts to be made using a Ranged weapon. This ring does not guarantee the sneak attack will successfully hit. Furthermore, this ring does not enable the rogue to sneak attack a creature that is immune to being sneak attacked.