White, as Dickens Nuttinson, had known all the while that James was not his normal self.
It was evident at first in his behaviour but Dickens brushed it off since James was quite a cocky person.
It was after three separate occasions of sensing Notsack's demonic aura and James' own mana within the same time frame that Dickens began to strongly believe that they were linked and came up with his speculations.
Perhaps, that was why James also possessed an arcane magic just like him.
Maybe it was Notsack's own magic that was injected into the magic paper that day.
Arcane magic had been very rare, so rare that some people don't get to see a new user in their lifetime, much less, two new users in the same day.
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Back to the present day.
White didn't move any further after kicking his demonic foe away and through the building.