Control
Kirnish returned after helping Isaac readjust the dungeon conditions. For some reason, he looked satisfied; some of his advice was accepted by Isaac and applied to the dungeon. This made him feel valued. Compared to when he served Baron Gustav, none of his ideas were ever accepted.
Most demons were too arrogant to hear the thoughts of the beings they thought were inferior, while Isaac was quite open-minded. As long as he got suggestions that were reasonable and useful for the dungeon, he wasn't hesitant to implement them. He realized that ego did not make him win this game.
Every creature had hidden potential, and Isaac would use them to achieve his goals.
"Learn every element in the dungeon, and use them to the fullest."
"Yes, my lord," Kirnish replied.