Fushigi Yugi Vol. 11 (manga)

The first Shentso-Pao treasure from the northern country of Bei-Jia was stolen from Miaka, and the only treasure left is in the western country of Xi-Lang--and both Miaka and her friend-turned-mortal-enemy Yui are intent on getting the treasure for themselves! But Xi-Lang isn't a frozen wasteland of forgotten dreams and ghosts like Bei-Jia. It's a vibrant, living desert country, whose inhabitants are veterans of the last clash between priestesses and gods!