Yelin had already foreseen that, in the future, Elder Sun might not only drag passing acquaintances over to look at ants, but might even offer them a "set meal" of it. He wondered if those people would be so infuriated that they’d want to kill him once they realized it was he who had taught Elder Sun these habits.
From Elder Sun, Yelin had learned the philosophy of "assembly line" insect rearing.
First, one had to grasp the basic concept of an assembly line. It meant pairing different Spirit Insects together to produce a positive synergistic effect. This didn't just apply to Spirit Insects; it could also involve Spirit Beasts and spiritual plants.
Chapter 30