The reason for William's hesitation became clear as he stood before the altar, eyes fixed on the Hero Summon option. He knew that each territory could only house one hero per grade. His current territory was of Tier 1 grade, and to summon a hero now would lock that spot, preventing him from summoning a stronger one later.
To raise his territory to Tier 2, he would need to perform a significant sacrifice. Specifically, he had to gather a sufficient number of demons of a higher grade to serve as offerings, allowing the territory to evolve. This evolution would not only expand the land but also unlock more powerful summoning options.