“deep inside the palace’s basement, a huge motor is busting up with energy right now, as we’re talking! hohoho!”
“The source of power to everything, the heart and brain of the Castle.”
And Meryl and Mr. Rabbit said in unison.
“The NUCLEUS.”

A shiver ran through Max’s spine. He looked down with shakingly hesitation.
An enormous metal heart was beating furiously at that exact moment. Pulsating, vibrating magic to the whole place.
He wondered what would happen if one, only a single one gear fell of the mechanism.
“it won’t explode, Max, if that’s what you’re thinking!”
“That’s where the Magic enters. The Graces’s power kept the system functioning endlessly, almost organically. That’s how it never stopped, and the machinery never broke. Nowadays, Thelesis itself maintains the Castle, and so it’s nervous system.”
“That’s a relief, I guess.”
“the capacity of the Machineria isn’t to be doubted of, dear!”
“And who made all of this?”
“hohoho, the ARTIFICER, of course!”