Luke felt the entire castle trembling as if it was responding to his mana. He also felt like he was obtaining control over the structure, but not that much control. Either he was lacking mana or the structure was supposed to obey completely only the previous owner.
"Let me check something…" Rina said and then walked on Luke's arms and then touched the crystal. "I can feel it… the spirit of hundreds of goblins in here… the goblin lord used their mana to control this structure."
"Even if they had a lot of mana… it was bound to run out, right?" Luke asked.
"No… they aren't dead inside this crystal. They still live," Rina said. "So, they still could recover mana and give to the Goblin Lord to control this structure and to make copies of them."
