It turned out that the Ouroboros had in fact known the solution to the problem he had with his magus core. The actual reason as to why it was really difficult for him now to cast any spells.
However, instead of telling him directly, they chose to keep the solution a secret from him because they wanted to keep him around to continue undergoing blood gene experiments. Even the magus who was sent to train him was specifically told not to tell him about this matter.
"You all are freakin' liars!!"
Needless to say, Emery was extremely annoyed when he found out about this. He felt like he had been toyed with like a child.
"Get angry if you want. Just don't forget the fact that without us you would already be dead." the Duke spoke indifferently.
Upon hearing that, Emery took a deep breath to calm his turbulent emotions and stared at the middle-aged man, waiting for him to explain further. Seeing that he had calmed down, the Duke finally spoke again.