When Zhen Liu arrived at Undertow, he had done so with two goals in mind.
The first was to task the [Neo Storm Knights], and possibly the kaijin duo back in Willow Scale City, with two assignments.
The first was to explore the Echoing Valley area and establish a foothold. Frosttusk's origins were rooted in this valley between the Roaring Tide and Soaring Griffin continents, and Zhen Liu needed as much information as possible about the place.
As for the second task, he wanted them to see if they could find any leads on the Fallen.
After their attack on Undertow failed, and Zhen Liu did that coordinated dance of death with Jin Fang that sent them and their submersible fortress flying to who knows where, the Fallen had more or less fallen off the face of the planet.
