Yisha pursued an investigation of The Story of Genes. Revising something so complicated was difficult, and could even yield dangerous results. But if no changes were made to it, learning it would be too hard.
Raising Han Sen to Duke level would be easy, and the resource costs would not be too hefty. But The Story of Genes made things far more complicated than she had anticipated. And raising Han Sen to Duke had been far more expensive than she expected.
There was nobody around, except for a few guards outside the tunnel's entrance.
But Narrow Moon had a lot of people watching the exit, and that included the Kings. They wanted to know more about the student Knife Queen had accepted. They wanted to know what made him so impressive that Queen herself would raise him.