The lich's wealth is truly rich.

Those liches were basically old monsters who had lived for hundreds or thousands of years. Even if the soul-summoning tower they built only collected ten souls a day, it would be 3,650 souls a year, and tens of thousands of souls in ten years. However, considering that the soul-summoning tower might have a maximum capacity, the souls here should be related to the blue flame at the top.

"Gain 8 points of killing power."

"Gain 1 soul point."

"Gain 4 points of killing power."

"Gain 11 points of killing power."

"Gain 1 soul point."

Within the range of the flame field, skeletons fell one after another. Today's undead seemed to be a little stronger, because the number of archers increased, and occasionally some skeleton mages could be seen, who could throw out black energy arrows.

Su Ziyu was really happy brushing his teeth today.

This time he gathered the Fire Demons together, and then used the Berserker Demons as bait, letting them rampage in the pile of undead. It only took a short while to attract a large number of undead, and then a wave of flame storms directly covered the undead.

The efficiency has been significantly improved, but the chance of the Berserker's death has increased.

But it was all worth it.

Because the profit of Su Ziyu pulling a wave of monsters is much higher than that of the Berserker itself. Considering that there is also a Lich here, of course efficiency is the first priority.

"Almost."

Today, Su Ziyu killed thousands of undead again, gaining about 30,000 points of killing power, plus about 1,500 points of soul value.

He decided to retreat temporarily after he discovered a ghost ahead.

Eighty percent of the Claw Demons were killed today, but two elite units appeared. Eight Berserker Demons died, and nearly half of them were besieged and killed by the ghosts that suddenly appeared. The other demons did not suffer any losses, and were only slightly injured at most.

The loss is still within the acceptable range.

Su Ziyu turned around and rushed out with the demon, preparing to change his position and try again tomorrow.

"Finally retreated."

A ghost was floating in the air, looking a little worried, and said, "The demons are almost rushing in today."

"I wonder how long the burial ground can hold them off."

soon.

The ghost flew all the way to the Summoning Tower. The demons had killed a lot of undead today, so it had to go to the Summoning Tower to activate it and revive itself.

Now I can only hope that the burial ground can keep these demons away for a few more days and prevent them from disturbing the master's research.

It's another fruitful day.

Su Ziyu directly expanded the number of little demons to three thousand. With so many laborers, the base camp soon changed its appearance. Buildings were being constructed and a wall was built around it. A large number of little demons were transporting supplies and mining ore. Now they have replaced the vassal races and become the main force of labor.

"bite!"

"The Abyssal Blood Pool captured a high-quality soul."

Just as Su Ziyu was lying on the stone chair enjoying the massage from the succubus lieutenant, suddenly a prompt sounded from the system.

Another harvest?

Su Ziyu stood up and went straight into the abyss blood pool.

——"Minotaur Soul (Excellent Quality): The soul of a Minotaur elite warrior. After being transformed into a demon, it is possible to awaken some special talents. The killing power consumed by the demon advanced mutation is reduced by 20%."

interesting!

It seems that some strong men died in battle near the Abyss Blood Pool, and their souls may be captured by the Abyss Blood Pool.

The succubus lieutenant just said that the minotaurs and ogres in the west have started a war. Today, the abyss blood pool captured the soul of a minotaur warrior, and the fire giant's soul was obtained in the same way last time.

Now that Su Ziyu is wealthy and powerful, he directly extracts this soul and becomes a violent demon.

As expected. It was another elite unit, the only difference was that it had the abilities of 'Rage' and 'Powerful Charge'.

There's nothing much to say.

Su Ziyu waved his hand and promoted him to a berserker, then arranged for someone to take him to the military camp.

Now Su Ziyu has no shortage of killing power or soul points, but the demon genes are a little insufficient. Demon genes are the key resource for promotion to mid-level demons. Now he doesn't promote low-level souls anymore, only high-quality souls will be promoted, because their potential after promotion is greater.

Su Ziyu once again led his demon army to the burial ground. There seemed to be fewer undead today, and the dark blue flame on top of the summoning tower was also much dimmer.

But today’s harvest is still good.

Su Ziyu still killed thousands of undead, and then evacuated with his men after seeing the ghost.

"Are these demons afraid of ghosts?"

"Why retreat as soon as we see a ghost? Should I summon more ghosts?" A ghost murmured in the distant sky.

At the same time, Su Ziyu appeared again with the demon army. There seemed to be fewer undead today, and the dark blue flame on the top of the summoning tower seemed a little dim.

"It looks like we won't be able to brush it many times." Su Ziyu said with a somewhat regretful expression.

This time they encountered quite a few ghosts.

Since there were not many other undead spirits, ghosts had to be killed as well, still with 20,000 to 30,000 killing power, plus 700 to 800 soul points. After reaping enough, Su Ziyu decisively stopped and retreated.

"We won't be able to stop them if this goes on!" In the distant sky, a ghost felt like he was sweating profusely.

The soul power stored in the summoning tower is almost used up.

At this rate, it would only take a day or two for the demons to break through the boneyard's defenses.

"I can only rely on the master's magic circle." The ghost said with determination.

Su Ziyu arrived as expected with his army of demons, and the number of undead had indeed decreased again. Now they looked a bit sparse, and if one wanted to kill monsters, they had to let the berserker rush around and pull the monsters for a while.

“What a pity.”

"There probably won't be much left tomorrow." Su Ziyu said regretfully.

However, today's harvest was not bad. In addition to obtaining a large amount of killing power and soul points, a snake demon and a fire demon were upgraded to elite units, and there were seven or eight elite units of violent demons.

After seeing Su Ziyu and his group, the ghost in the air lamented, "They are here again! I'm afraid we can't stop them today!"

"We must awaken the high-level undead in the Skeleton Fortress."

At this time, the flame of the summoning tower was already very dim. Su Ziyu had only gained more than 10,000 points of killing power today. He had already seen the skeleton fortress in the valley, which exuded the breath of evil and death from afar.

However, just as the ghost was about to activate the Withering Circle to awaken the high-level undead, Su Ziyu took his men away again.

“This place has to stay.”

Su Ziyu thought to himself, "Let's keep it for a while, maybe I can continue to kill monsters next time."

There will be no more undead in the short term.

Su Ziyu has never seen the lich. It is too dangerous to attack the skeleton fortress. Siege warfare is not easy to fight, so it is better to keep it for a while.

He prepared to fight the red dragon.

In case the casualties are too great, he can continue to come back to kill the undead.

----——