The space in the cave was limited, so Lin Shen could only first study how to combine the two, and wait for Tian Xun to return before finding a sufficiently spacious place for actual combat practice.
Tian Xun had indeed gone out, invited by An 117 and Chi 118 to a meeting.
An 117 had discovered a very special region on a mountain within the Giant Ring Star and suspected the existence of mutated Nirvana Creatures. He wanted to invite Tian Xun and Chi 118 to explore the mountain together.
However, the mountain came with many restrictions, and they were not willing to take the risk yet. After discussion, they decided to jointly dispatch a Pioneer Corps from all three parties, to first clear up the numerous restrictions on the mountain and the status of the creatures there. It wouldn't be too late for them to ascend the mountain once the time was mature.