I was running around in the Keeps 2 or 3 area with a buddy and this sucker dropped. I didn't ID it till I got back to town, but I was surprised that it was such a huge upgrade for me. Even when I was wearing my best dps Witching Hour, I still got an 11.1k dps boost.
If you don't feel like opening link
+55 Cold Resistance
+9% Attack Speed
+43% Critical Hit Damage