Reclaiming the Key

The brother and sister exchanged a glance, then said hesitantly, "But... the scene you just described really sounds like an ancestor spirit manifestation described in a book. Their souls attach themselves to certain beasts, granting them the ability to manipulate elements. They're incredibly powerful."

Benjamin raised an eyebrow.

He would refrain from commenting on the "incredibly powerful" part for now, but the rest did sound quite similar. This seemed to be a special technique developed by an Overseas Sect, one that allowed ghosts to serve a different purpose.

So... what exactly was the difference between their method and Benjamin's?

With that thought, he suddenly asked in a slightly provocative tone, "If I let you do whatever you want to this ghost, could you figure out this method of 'Ancestor Spirit Taming'?"

"Th-that... I don't think we can."

"Just give it a try. With the methods we mages have, spiritual entities like this are extremely scarce anyway, so I doubt we'll be able to research much from it." Benjamin persuaded them. "You received the most orthodox training in Mind Arts. You'll definitely be able to discover something from this."

Hearing that, the brother and sister turned to look at the ghost inside the glass enclosure again. In the end, they nodded.

Satisfied, Benjamin turned and left.

He granted the two of them free access to the Undead Research Building and also explained matters related to Mind Arts to the others inside. For the time being, Mind Arts and the undead were both secrets hidden within the Academy, known only to a few people. However, Benjamin estimated that the undead would likely be exposed before Mind Arts.

—In any case, even if the undead were exposed, The Church would never be able to draw upon their power, so it did not matter.