"What's going on with all this?"
After discovering the new survival rules, Terramus felt puzzled. After all, the signs of human interference were too obvious. He couldn't understand why the Demon King who had captured him was treating him this way.
From the environment he lived in and the food he could obtain, it didn't seem like abuse; rather, it resembled a special kind of training.
However, even though Terramus was trying hard to adapt, the changes in the environment far exceeded his ability to keep up. Whenever he thought he could have a period of stability, new changes in the rules targeting him would emerge.
The person who set the rules wanted to keep him in a state of constant mental tension, leaving him no peace, forcing him to endlessly fight with the undead.
"Father, is that you?"
Even during battles, Terramus kept thinking, and he locked the greatest suspicion on his own father.