Super easy this one
when you have chsen Falon and ended up in the sura wastes you will need to find your old clan ….go to the quest marker on the map make sure you have your max soulstone charges upon entering the cave (in case you need heals) Falon will see her kin ….. they believe her to be dead and become hostile at that point turn straight to devourer and literally cheese it through the cave to the quest marker I literally ran past everything occasionally turning to freeze some close by enemies once you reach the end speak to your bro gate opens cheevo ….DING!!