Forgotten Vale, looted from a Frost Giant near the Glacial Crevice. Upon exiting the Glacial Crevice and entering the Wayshrine of Radiance. After exiting the wayshrine, go right though the cave passage going downhill though the cave, the player will reach a canyon with a falmer village inside. Pass through the entire village until reaching the Glacial Crevice (do not enter). Immediately to the right is a track running uphill. Follow it all the way up to the top to find a glade with a Frost Giant in it, which can be looted for the Diamond Paragon once it's dead. Note that the trackway is immediately to the left upon exiting this area of the Forgotten Vale, if walking in the opposite direction from the Inner Sanctum. There is a Falmer fence at the entrance of the pathway, and there are bodies littering the way.