After Han Sen returned to the island, he saw his legless crane resting beneath the tree. He put some meat in its bowl, then went into the house to practice Under the Sky.
Under the Sky was very delicate. The technique did not have much flair, and it wasn't overbearing, like Teeth Knife. But when you used the skill, it was like a rippling ribbon that could not be cut. The knifeskills looked random, but they were all connected.
It could trap an enemy without them noticing. With it, Han Sen might even be able to control the enemy as if they were a puppet. Under the Sky was not too dissimilar to Heavenly Go or the Dongxuan Sutra. It was still quite unique, of course.
Heavenly Go focused on one's formation. The Dongxuan Sutra was excellent when it came to prediction. Under the Sky focused on direct control.