Help to recall that for the ring? (The Elder Scrolls 5: Skyrim)

When I played Skyrim a year ago, got herself one unique ring, and now, having decided to start playing again, I can't remember where to looting. Now I will try to describe from memory, the location and what kind of ring. General location regular Nordic ruins, at the end of which there is a boss draug. but I can't remember exactly whether he is from the tomb of the climbs, whether he is a Ghost sitting on the throne.and now the ring: giving a lot of unique buffs, namely, 15% movement speed, 15% HP regeneration and kind of resist cold 30%.even when put it on, the character comes from some sort of icy aura...the text of the ring to beat on anglese, this is the assumption that it is a mod...although I didn't put then.