IB rules and a method to track it

“Do you remember what I said about leylines?”
“...You said that they were one of the types of energy that could be used for magic other
than the magic power created by humans. If I remember, they have to do with the Earth
and its terrain,” Accelerator said.
“That’s right.” Birdway nodded. “And Imagine Breaker negates all kinds of supernatural
powers. And that includes the power circulated by the planet.”
“So, his right hand is like a snowplow and that giant fortress is following the path he’s
created?”
“It’s not that simple,” Birdway responded to Accelerator’s question with a sardonic grin.
“Imagine Breaker works exceedingly well when it is normalizing abnormal values, but it
does not show much power when dealing with something that is uniform from the start.
It only carries out destruction of things that have already had their harmony
taken. ...For example, he does not destroy someone’s soul when he touches them, and he
does not destroy the planet when he touches it. Yet those things do indeed have
supernatural power flowing through them.”
“...Does it really work so conveniently like that?” asked Kamijou himself.
The boy looked down at his right hand, and Birdway continued speaking in an arrogant
way.
“This isn’t just limited to Imagine Breaker. Natural powers like yours are often initially
set to conform to the environment or situation. And the natural Gemstones are people
who received esper powers via stimuli from the environment of Earth,” she said in a
simple manner. “To talk about the leylines... Oh, I know. I’ll use the example of a
snowplow you used. When Imagine Breaker scrapes away the accumulated snow, more
snow quickly accumulates, preventing anyone from seeing the path. It would be more
accurate to say that a cycle like that has been set up from the beginning than to say that
it has to do with how much the planet can replenish the power.”
***
“The amount removed by Imagine Breaker is made to be naturally compensated for by
the surroundings. ‘They’ have interfered with that cycle. They have made it so that a
mark only Radiosonde Castle can detect will be left behind during the process of
repairing the amount removed.”
“How...?” asked Hamazura who still had not quite come to grips with the concept of
magic. “Saying they interfered with the planet is simple enough, but how did they do it!?”
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“They used feng shui. The locations of mountains and rivers change the flow of energy,
so people build their palaces in the most suitable place based on that. ...Well, the
opposite is also possible. If you want a certain change to occur to the energy of the
leylines, you just have to systematically destroy the mountains and rivers.”
It was easy to say.
For the sake of a single spell, the terrain had been blotted out somewhere on that planet.
That was yet another result of the individual surpassing the whole. The magicians used
everything at their disposal to carry out the goal before their eyes without giving any
thought to what would come later.
Hamazura gulped.
“Would they... would they really go that far to find a single person...?”
“Compared to Radiosonde Castle, that is nothing more than a sub spell. How much
energy do you think it takes to make a mass that huge float like that? Well, it’s certainly
not something you can pull off with gas turbines,” Birdway said smoothly. “Let’s get
back to the topic at hand. In order to follow Imagine Breaker, ‘they’ have interfered with
the system of the leylines running through this planet. Imagine Breaker destroys that
energy, and their mark is automatically created in the process of the repairing cycle. It’s
like a potato or a jewel. Using that, Radiosonde Castle can accurately follow Imagine
Breaker no matter where in the world he flees. Do you understand that much?”

- New Testament Volume 2 Chapter 4 Part 1