Castle of Black Iron

Zhang Tie sensed that someone was approaching the fleet of airboats from 60 miles away by his great spiritual energy, which had turned real.

Zhang Tie's spiritual energy spread over the void densely. As long as that thing entered the range of his perception, it had been discovered by Zhang Tie.

It was a person who was approaching the fleet from ten o'clock in a pretty presumptuous yet meticulous manner.

Zhang Tie's heart raced; however, he didn't turn around; instead, he just threw a glimpse at the target slightly. With his lotus-flower eyes, Zhang Tie couldn't see anything within 60 square miles. It was his first time to encounter such a situation. Therefore, he was shocked for a time.

Although Zhang Tie's lotus-flower eyes were not in the strongest color temperature, Zhang Tie had already triggered his dark vision ability and could look far in dark. In this state, he could usually see clearly hundreds of miles in dark; even mosquitoes and bugs couldn't escape his eyes.

However, Zhang Tie would not make a mistake in spiritual perception. In the blink of an eye, Zhang Tie had sensed that person was about 50 miles away from the fleet; additionally, Zhang Tie was confident that the distance between the stranger and the fleet was increasingly narrowing. Although many things were invisible to the eyes, it didn't mean that they didn't exist.

What if, what if that person was completely invisible!

In Taixia Country, Zhang Tie would regard it as nonsense if someone said he could be invisible. However, there were too many unprecedented secret methods and items in Motian Realm. On this occasion, Zhang Tie wouldn't feel strange if someone could hide himself with the help of some secret method or item.

As Zhang Tie thought about it, he instantly brushed his lotus-flower eyes and input more spiritual energy into the surging points around his lotus-flower eyes like how a machine increased its operating power. As a result, his lotus-flower eyes immediately reached a higher level on which he could observe the color temperature.

After brushing his lotus-flower eyes several times consecutively by adjusting the "frequency" of the six surging points around his lotus-flower eyes, Zhang Tie finally captured a transparent human shape in the void.

That person was in a bizarre state. Even in flight, he didn't arouse any wave or response in the surrounding air; additionally, he completely hid his qi. With lotus-flower eyes, Zhang Tie found that the arriver's color temperature as a whole was integrated with the surrounding environment perfectly. If not Zhang Tie's unprecedented superb spiritual energy and his high-level lotus-flower eyes, he might not discover the target at a stroke.

Even though, Zhang Tie still couldn't see clearly the look of the stranger; instead, he could only see the shape of a transparent human which was caused by the trivial looming color temperatures of water molecules when in slight collisions and frictions with air.

Zhang Tie was really startled by this. 'F*ck, if he uses a secret method, it must be amazing! The hiding effect is over 10 times greater than that of my master-level hiding skill. I couldn't see through him even with my lotus-flower eyes.'

Given his shape, Zhang Tie realized the arriver was flying himself without any flying outfit, which meant that the stranger was at least a heavenly knight, a wind immortal general as was widely accepted in Motian Realm.

That person moved weirdly while hiding himself. For a time, Zhang Tie couldn't identify whether he was a foe or friend. 'Is he coming here to take a look or harm the people of Dragon Emperor Immortal Palace according to his conspiracy.'

As several whims occurred to Zhang Tie, he became pretty alert as he was ready to release his battle qi and launch a kinetic strike. Apparently, Zhang Tie was still flying with the fleet leisurely like a shepherd dog watching a herd of sheep as if he didn't find that person was approaching the fleet.

Of course, the heavenly knight had discovered Zhang Tie; however, he didn't head for Zhang Tie; instead, he circled around the fleet from less than 5,000 m to less than 10,000 m away in all directions at a high speed for a few times. After going through the fleet of Dragon Emperor Immortal Palace carefully, he flew afar.

It was absolutely a detective. 'It seems that I've got a business.'

Watching that person leaving, Zhang Tie licked his lips. When the stranger was over 65 miles away from the fleet, Zhang Tie started an action as he applied a master-level hiding skill and closely caught up with that person from 65 miles away spiritually.

In the dark, although Zhang Tie's master-level hiding skill was not as exaggerated as being transparent, he was at least looming and almost combined with the dark; additionally, his qi as a whole was as trivial as a particle of dust in the universe.

After positioning that person with his spiritual energy, Zhang Tie didn't chase after him straightly; instead, he used those air-borne mountains as cover, creating blind angles for that person. After that, he chased him by triggering his flight ability as a divine dominator.

Although being transparent, that person didn't fly as fast as Zhang Tie; he could only fly about 2,500 miles per hour. Additionally, being positioned by Zhang Tie's spiritual energy from over 65 miles away, he could barely escape Zhang Tie's perception. Even if he looked back, he wouldn't find Zhang Tie.

Perhaps out of his confidence, that person didn't even take a look back all the way.

After flying over 600 miles, that person finally came to a cave of an air-borne mountain and entered it. Zhang Tie landed on the back of a smaller air-borne mountain which was only a bit higher than 80 m from over 50 miles away; meanwhile, he kept fixing his spiritual energy onto the person.

As Zhang Tie extended his spiritual energy into the mountain cave, he instantly found another person inside there...