After fleeing the Immortal Emperor, you found yourself back in the Divine Era, in the midst of one of Rahyeh's raids. In trying to make your way down the mountain, you found yourself in the middle of the conflict and coming face to face with Heorot, the god of the north.
After meeting Heorot, Rahyeh appeared and a battle between gods ensued. Rahyeh struck a fatal blow and then fled, leaving Heorot to bleed out on the snow. Heorot recognized something unique about you and requested that you retrieve the Lance of Heorot, the same weapon Yulia mentioned as the key to defeating the Immortal Emperor.
At this point, a different Yulia appeared, young and living, and upon speaking with her, she agreed to let you take the Lance once Rahyeh has been dealt with.