Aside from using his cheat combination to obtain mana, Billy confirmed that the dungeon cores also obtain extra energy when the monsters' bodies spawn and decompose overnight. So, actually, fighting makes the core grow stronger… with that in mind, Billy wondered how dungeon breaks don't happen all the time. The cores should have enough mana to spawn the guardians whenever they wanted at that rate. However, that wasn't all.
"Unless… Uvish designated them to be like that," Billy thought. "While he created monsters like the titans to put our strength to test, he wouldn't gain much if dungeons break left and right and wipe out the population nearby."
In any case, it took four days for the tyrants to reach level two hundred. They finally were able to entertain his wives and friends, and they were so bloodthirsty… In any case, after fighting the level two tyrants for the whole day, they were finally satisfied and decided to move on.