There was no magical glow, no disturbance in his perception of reality, and no mystical sensation.
In other words, the Lumocecuren spell Vaughn had developed was completely invisible even to a Legendary Wizard like him!
Just imagine: a spell that even the Legendary Wizards at the very pinnacle of the wizarding world could not detect, much less defend against. If it spread, how much damage would it do to the existing order?
That was why Dumbledore had to understand how it worked and assess its danger!
Vaughn naturally understood Dumbledore's concerns. When he first developed this spell, he had been fully aware of its dangers. More precisely, if it had not been dangerous and undetectable, he would not have been interested in developing it.
In fact, developing such a spell was itself a form of "deterrence" aimed at Dumbledore.
So he had no intention of hiding anything. He answered frankly, "Muggle optics and electromagnetism. The reason you can't see or sense it is that the principles this spell employs belong to the realm of invisible light."
"Lumocecuren is a spell I developed using the near-infrared band. Infrared light in this band has a particular property: most substances, such as human bodies and cells, are as transparent as glass to it. It passes straight through, with no obstruction and no absorption. Naturally, that makes it invisible to humans."
Vaughn's explanation was simple and accessible. Even someone as scientifically "illiterate" as Dumbledore understood it immediately.
He could even extrapolate. "Wait. If it passes straight through, how were that North American wizard's eyes injured?"
Dumbledore had keenly identified the heart of the matter.
Vaughn answered with a smile. "That's the beauty of science, Albus. Human cells can't block or absorb near-infrared light because its individual photons have very little energy-so little that they