Briona Gwydion the Dragonbein Range (竜骨山脈ブリューナ・ギデオン, Ryūkotsu Sanmyaku Buryūna Gideon) is a Lost Ground located at Θ Hidden Forbidden Dragonbein. In Project .hack, "Dragonbein Range" was translated as Keel Mountains. Spoiler warning: Plot and/or ending details follow.