Outside Tianhu City, Su Tong headed straight for the True Fire Mountains.
He had already asked for clear directions beforehand.
At least now he wouldn't get lost.
The Lei Jing Beast flew in the sky above, and Su Tong simply closed his eyes to nurture his spirit.
This leg of the journey was quite long.
He hadn't yet learned the Profound Flame Demon Hidden Formation that he had acquired at the auction house previously.
Now was a good time to do some casual cultivation.
It was a fifth-grade formation.
With Su Tong's current spiritual power, constructing it was not too difficult.
Of course, having strong spiritual power didn't mean one could automatically learn to arrange formations.
It was just that Su Tong could understand the instructions on it and directly convert them into the ancient divine language.
He took out the Profound Flame Demon Hidden Formation scroll.
Su Tong directly stuck it to his head, and in that instant a white light flashed.
Much information poured directly into Su Tong's mind.
"Profound Flame Demon Hidden Formation, a fifth-grade formation. After setting up the formation, it can gather profound flames to trap enemies within the Profound Flame Demon Hidden Formation..."
"The formatter can condense mental entities within the Profound Flame Demon Hidden Formation, hiding within the profound flames, controlling them to kill those trapped inside the formation..."
"The Profound Flame Demon Hidden Formation has three layers. The first layer can trap a thousand enemies, the second layer can trap ten thousand enemies, the third layer can trap a hundred thousand enemies!"
Su Tong was quite interested as he looked over the introduction to the Profound Flame Demon Hidden Formation.
"It takes a lot of time to set up the formation!"
Su Tong saw from the instructions that arranging the formation was rather troublesome.
It looked like it would take a lot of time to finish setting up the formation.
"With spiritual power at the core..."
"Condense the spiritual fire, ignite the profound flames..."
"Use spiritual power to condense the entity, hiding within the formation..."
These were the instructions for the Profound Flame Demon Hidden Formation.
Su Tong understood them clearly and knew what to do.
"It deserves to be a fifth-grade formation. Just the spiritual power consumption makes it so even ordinary fifth-grade spiritual power can't set up this formation."
Su Tong examined it closely over and over.
He felt the formation was very difficult.
Not only did spiritual power have to act as the core of the formation, it also had to condense the profound fire, and finally condense an entity.
This placed extremely high demands on the control of spiritual power.
Fortunately Su Tong's spiritual power was not weak.
"I can set it up!"
Su Tong was very confident in his spiritual power.
Ever since he improved the method of cultivating spiritual power, his progress had been extremely fast.
Of course right now midair Su Tong naturally couldn't directly construct the Profound Flame Demon Hidden Formation.
He could only practice in his mind.
In his mindscape, there was pitch blackness.
"With spiritual power at the core of the formation!"
Su Tong murmured with his eyes closed.
Then in the darkness, a point of white light appeared.
Converging at one point, after a moment, strands of silk began to spread out from that point of spiritual light.
The white rays criss-crossed in all directions.
Spreading outward little by little, it began to take the shape of a formation.
"Spiritual fire, ignite flames!"
Su Tong spoke again.
At the ends of the spiritual power strands, where they connected, one cluster of fire after another began burning.
These flames grew bigger and bigger.
Though they seemed haphazardly distributed, there was actually some method to it.
Based on this distribution, Su Tong found the most suitable spot.
Able to attack and retreat!
"Spiritual power, congeal!"
Su Tong shouted lowly, then spiritual power surged out and directly congealed into an illusory shadow.
The shadow was somewhat transparent, but looking at its features, it was clearly identical to Su Tong.
"Success!"
Succeeding in one go was somewhat beyond Su Tong's expectations.
But this was just practice in the mental world.
To actually apply it in reality, he would need some more honing.
"Dismiss!"
Su Tong said slowly.
The Profound Flame Demon Hidden Formation constructed in the mental world
also dispersed at this time.
"Again!"
After dismissing the formation,
Su Tong began condensing again.
Though the True Fire Mountains were the closest to Tianhu City,
in truth they were still very far.
So on this journey, he had ample time for Su Tong to practice.
And so, a day passed like this.
During this day, the Lei Jing Beast did not rest, continuously flying the whole time.
And Su Tong was constantly in his mental world, condensing the Profound Flame Demon Hidden Formation.
"Spirit eye formation!"
"Spirit fire, profound flames!"
"Spirit power, congeal myself!"
This time, Su Tong used the ancient divine language.
Just simple three lines.
Yet a Profound Flame Demon Hidden Formation took shape directly in the mental world.
"Success!"
Looking at the complete Profound Flame Demon Hidden Formation, Su Tong was satisfied.
He had tried many times, and found these fifteen words to be the most suitable.
With fewer words, the formation could still take shape.
But its power was much weaker.
Exceeding this word count didn't increase the power much either.
But condensing it became much more difficult.
After all, the ancient divine language wasn't something one could just use casually, it still depended on one's own strength.
Su Tong had tried longer sentences before, and the power did increase significantly.
But in an instant, it depleted all of Su Tong's spiritual power.
He nearly fainted on the spot.
Only with these fifteen words could the condensed Profound Flame Demon Hidden Formation have the most suitable condensing speed and power.
"Roar!"
Just then, the Lei Jing Beast let out a low roar.
"Dismiss!"
The Profound Flame Demon Hidden Formation in his mental world dispersed at this time as well.
Su Tong opened his eyes.
Before him was an endless stretch of mountains.
The entire mountain range was fiery red.
Whether it was soil or trees, everything was fiery red.
The wind blew, swaying the trees, as if flames were burning.
"This must be the True Fire Mountains?"
Seeing the scene before him, Su Tong smiled slightly.
It was said that within these True Fire Mountains were quite a few powerful spirit beasts.
Much stronger compared to other places.
There were also many mutated spirit beasts.
Now Su Tong felt this was probably related to that ancient battlefield.
After all, there must have been many spirit beasts in that ancient battlefield too.
Some of the spirit beasts here likely escaped from that ancient battlefield.
"Hmm? Little Lei, go over there and take a look!"
Just then, Su Tong's spiritual power spread out.
He felt some strange ripples in a certain direction.
Since he was already here, Su Tong intended to go take a look.
After all, this was the True Fire Mountains, perhaps he might chance upon that ancient battlefield.
"Roar!"
The Lei Jing Beast let out a low roar.
Then its wings shook, transforming into a streak of red-purple light shooting towards the direction Su Tong indicated!