Castle of Black Iron

Only after a casual look, Zhang Tie had known that there were definitely more than 2 million demons over Xiangshan City. They were at least LV 9 fighters. By contrast, the corps of 100,000 demons that appeared in Waii Subcontinent were well dwarfed.

The camp of the demon corps was in Xiangshan City. Looking from afar, Zhang Tie could see a lot of demon knights rising and falling in an area of Xiangshan City. In the periphery of this demon corps, the squad of over 100 demon knights that Zhang Tie saw just now was patrolling in the sky. The inside of the camp was also guarded by demon knights. Those spider demons were moving rapidly in the periphery on earth like scouts. The entire encampment of demons was covered with demon scouts and knights within hundreds of miles' territory. Even human knights could barely break into the encampment of the demon corps all of a sudden.

Except for the little black beetle which could freely access to such a place which was crowded with demons.

With the effect of a master-level hiding rune, the little black beetle almost integrated with the nightscape by hiding both its sound and qi. Even in knight's consciousness, it was also like a speck of lifeless dust.

Zhang Tie directly flew 100 m above those demon fighters and their tents towards Xiangshan City.

Not knowing why, when he saw Xiangshan City once again, Zhang Tie couldn't stand taking a look at the old man who didn't feel like leaving the city.

Only after a short while, Zhang Tie had reached the street where the only ancient well was left open. Many houses in this block had been destroyed while a great number of iron-armored demons were stationed in the city. Zhang Tie arrived at the small courtyard where the old man was living in. However, the small courtyard had long been burned into ashes along with the neighboring houses and courtyards.

Although Zhang Tie knew that the old man had determined his mind to stay in Xiangshan City, Zhang Tie still felt a bit sad when he imagined how the old man burned down his own home when the demons arrived.

As for some, this war was just about changing figures, namely, how many cities Taixia lost, how many fighters sacrificed and how many civilians died. However, it was numerous commoners' blood and tears behind these changing figures.

A strong killing intent rose from Zhang Tie's heart.

With a sound "boom...", when Zhang Tie was loitering above that scorched ruins, a boom drifted into his ears from behind which attracted Zhang Tie's attention at once.

The sound drifted from the direction of that ancient well. Zhang Tie turned around and flew over there.

Under the guidance of an iron-armored demon official, a team of iron-armored demons was pushing down a building beside the ancient well. After that, they carried a 2-m higher rockery out of the ruins and threw it into the ancient well to cover it.

Instead of being buried by the army of Taixia Country, this ancient well was finally buried by demons.

The demon official issued its orders in gibberish.

Honestly, Zhang Tie didn't understand demons' language very well. He just learned it on occasions after promoting to a knight. Therefore, he could only understand a few words, though he couldn't understand coherent sentences.

Zhang Tie could only understand some words such as "only", "problem" "forbid drinking" and "new pool..."

Compared to that it was very difficult for humans to learn demons' language, it was much simpler for demons to learn humans' language, namely, by taking human brains. By taking human brains, a demon knight could grasp that human's gift of tongues. That was terrible! Given this point, all the demon knights who could speak human language must have eaten human brains.

Although Zhang Tie didn't completely understand what this demon official was talking about, he could almost figure it out by combining with what it said with what he saw——after finding that this was the only ancient well available in Xiangshan City, the demon corps was worried that the human corps had poisoned it; therefore, they directly buried it and forbade demon fighters to get water from here. As over 2 million demon fighters were in Xiangshan City, they had to drink water; therefore, they could only open new wells for water.

Zhang Tie instantly remembered that he saw some demon fighters safeguarding some water pools on the way here. Those water pools were completely caused by knights' strikes. The powerful battle qi strikes caused many big pits whose depth varied from 10 m to 20 m. After that, those demon knights casually dug and dealt with them. This was the most convenient way for demon corps to get water on the premise that they had demon knights.

'Water pool!'

In a split second, the strong killing intent disappeared because Zhang Tie had thought of a method.

'It's feasible as long as demons could drink water.'

Because Zhang Tie had Heller raise 4 fat and strong double-headed parent puppet worms in Castle of Black Iron, which were acquired from Pingsha Valley, Longxi Prefecture, Zhongzhou Province. Since he got them, Zhang Tie had not put them in use. The astronomical worm eggs that the 4 double-headed parent puppet worms laid every day were all preserved by Heller for study.

As long as he stealthily put those worm eggs into those water pools and had them take it themselves could Zhang Tie easily kill a lot of demon fighters.

Of course, it was almost impossible for others to do it; however, with the incarnation of little black beetle and Castle of Black Iron, Zhang Tie could do it easily. Those who only grasped the secret method of the incarnation of "Great Wilderness Sutra" couldn't do it; neither could the one with only Castle of Black Iron do it. Only by combining the two abilities could one do it.

When Zhang Tie thought about it, he directly flew to the nearest water pool.

That water pool was over 200 m away. The strong battle qi strike caused a big pit whose diameter was over 30 m and depth over 10 m. They only paved some stone plates at the bottom of the pit.

There were burning torches around that water pool. Over 10 iron-armored demons were on sentry duty around the water pool with their backs against it. Nobody irrelevant could approach the water pool for free. Perhaps, demons were afraid that they were poisoned by humans; therefore, they assigned exclusive people to keep an eye on these water pools in the encampment.

An end of a water pipe which was once used by humans was deep in the water pool. Some demon fighters were rocking a common manual pumping unit and extracting water from the water pool into a water tank constantly.

Teams of demon fighters were queuing up to get water around the water tank. There were 2 fish in the water tank, which was the easiest way of testing the quality of water being always adopted in the war. If the water quality was fine, the fish would not die.

Although the fish in water tank could react to poison, they couldn't react to the eggs of parent puppet worms. Even demons might have not imagined that they could be trapped by eggs of parent puppet worms.

Soon after Zhang Tie arrived there, some demon fighters had started to roar and fight each other for water, causing a bit of turmoil. A demon official instantly rushed forward. After blaming them loudly in gibberish, he whipped them forcefully, causing bloody wounds on those iron-armored demons. The turmoil soon stopped. Closely after that, those demon fighters continued to get water.

Even demons couldn't imagine that someone would give them an unforgettable lesson tonight.

The little black beetle declined and reached the bottom of the water pool directly.

The moment the little black beetle touched the bottom of the water pool, its body had become a tunnel that connected Castle of Black Iron while it started to release a transparent, glutinous liquid into the water.

The transparent, glutinous liquid contained the eggs of the double-headed parent puppet worms. Each drop of liquid would contain tens of thousands of tiny eggs.

In less than 1 minute, Zhang Tie had left numerous eggs of double-headed parent puppet worms into the water. Closely after that, he flew out of the water toward another water pool.

None of the demon fighters at present had noticed anything abnormal, those who were rocking manual pump or those who were safeguarding the water pool. When the water was extracted into the water tank, the two fish were still swimming happily as if they were not influenced by the change at all. Teams of iron-armored demons were still queuing up for water. After whipping those demon fighters, the official immediately drank some water to his heart's content as he didn't realize anything was wrong at all. When this official finished drinking, the little black beetle had already reached the bottom of the second water pool. Like what he did before, he released a lot of eggs of parent puppet worms into the water...

The 3rd, the 4th, the 5th, the 6th...

Parent puppet worm was a special tool that demons usually used in wars. This item was not used on humans until the last holy war came to an end. Soon after this holy war broke out for a few years, demons and Three-eye Association had already caused so many disasters and terrors in continents and subcontinents using parent puppet worms. Demons might not imagine that they could be attacked by parent puppet worms. To be honest, demons had not made any preparation and defense against such a strike...

That was quick retribution!