The Witch Demon's wealth is truly abundant.

Those Witch Demons are essentially monstrous beings who have lived for hundreds or even thousands of years. The Soul Summoning Towers they establish, even if collecting only ten souls per day, would amount to 3,650 souls annually, summing up to tens of thousands over a decade. However, considering the possible capacity limit of the Soul Summoning Towers, the souls here should be related to the ghostly blue flame at the top.

"Gained 8 points of Power of Slaughter."

"Gained 1 point of Soul Value."

"Gained 4 points of Power of Slaughter."

"Gained 11 points of Power of Slaughter."

"Gained 1 point of Soul Value."

Within the range of the Flame Domain, skeletons fell one by one. Today, the undead seemed a bit stronger, as there were more archers, and occasionally some Skeleton Mages could be seen throwing black Energy Arrows.

Su Ziyu was genuinely enjoying the day.

This time, he gathered the Fire Burning Demons and used the Frenzy Demons as bait, letting them rampage within the undead pile. It wasn't long before they attracted a large number of undead and a wave of Flaming Storm struck them completely.

The efficiency had clearly improved, although the casualty rate of the Frenzy Demons had increased.

But all of this was worthwhile.

Since if Su Ziyu attracted a wave of monsters, the gains far exceeded those of the Frenzy Demons themselves, and considering there's a Witch Demon here, efficiency is undoubtedly the top priority.

"It's about right now."

Today Su Ziyu eliminated thousands of undead, harvesting about 30,000 points of Power of Slaughter, along with approximately 1,500 points of Soul Value.

He noticed the appearance of ghosts upfront, so he decided to temporarily retreat.

Today, eight out of ten Sharp Claw Demons were lost, but two elite units emerged; eight Frenzy Demons died, nearly half of them were besieged by suddenly appearing ghosts, other demons suffered no significant losses, at most just some minor injuries.

The losses were still within a bearable range.

Su Ziyu turned back, leading the demons in a charge out, planning to switch positions and come back tomorrow.

"They finally retreated."

A ghost floating mid-air expressed concern: "The demons almost charged in today."

"I'm not sure how many more days the Land of Burial can hold them off."

Very soon.

This ghost flew straight to the Soul Summoning Tower; the demons eliminated quite a few undead today, it had to go and activate the Soul Summoning Tower to revive some.

The hope was that the Land of Burial could continue to fend off these demons for a few more days so as not to disturb the master's research.

Another day of abundant harvest.

Su Ziyu directly expanded the number of little demons to three thousand, with such a large workforce, the base camp quickly transformed, buildings were under construction, walls were raised on the outskirts, a large number of little demons were transporting supplies and mining stones, now they had replaced the vassal races as the main labor force.

"Ding!"

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

As Su Ziyu lay on a stone chair enjoying the massage from the enchanting demon adjutant, suddenly a sound from the system came through.

There was another harvest?

Su Ziyu immediately got up and went to the Abyssal Blood Pool.

——"Minotaur's Soul (Excellent Quality): A soul of a Minotaur elite warrior, may awaken some special talents when transformed into a demon, reduces the Power of Slaughter consumption for demon advancement mutation by 20%."

Interesting!

It seemed that near the Abyssal Blood Pool, if strong individuals died, their souls could be captured by the pool.

The enchanting demon adjutant just mentioned that the Minotaurs on the west had a confrontation with Ogres; today the Abyssal Blood Pool captured a soul of a Minotaur warrior. Similarly, the last Fire Giant soul came this way.

The current wealthy Su Ziyu directly extracted this soul to elevate it into a Frenzy Demon.

Sure enough.

Another elite unit, the only difference being it had additional 'Fury' and 'Powerful Charge' abilities.

No need to say more.

Su Ziyu waved his hand, promoting it to a Frenzy Demon, and arranged for someone to take it to the military camp.

Now Su Ziyu lacked neither Power of Slaughter nor Soul Value, though demon genes were becoming scarce. Demon genes are the crucial resource for advancing Middle Tier demons, now he doesn't promote Low Tier souls, only high-quality souls are elevated since their potential post-advancement is larger.

The next day.

Su Ziyu once again led his demon army to the Land of Burial, today the undead seemed fewer, and the ghostly blue flame atop the Soul Summoning Tower had dimmed noticeably.

However, the day's harvest was still good.

Su Ziyu continued slaying thousands of undead, and upon seeing ghosts, swiftly retreated with his people.

"Are these demons afraid of ghosts?"

"Why do they retreat upon seeing ghosts? Should I summon more ghosts?" murmured a ghost in the distant sky.

The third day.

At the same time, Su Ziyu appeared once more with his demon army, today the undead seemed even fewer, and the ghostly blue flame atop the Soul Summoning Tower seemed lackluster.

"Looks like not many more chances to grind," lamented Su Ziyu.

They encountered a lot of ghosts this time.

Due to fewer other undead, ghosts had to be slain too, still bringing in two to three tens of thousands of Power of Slaughter, plus seven to eight hundred points of Soul Value. After gaining enough, Su Ziyu decisively withdrew.

"This may not hold them off much longer!" cried a ghost in the distant sky, feeling somewhat drenched in sweat.

The soul power stored in the Soul Summoning Tower was nearly depleted.

If this continues, it might only take a day or two for demons to break through the Land of Burial's defense.

"The master's array is the only reliance," resolved this ghost.

The fourth day.

As scheduled, Su Ziyu led his demon army, and the number of undead had indeed decreased again, now appearing rather sparse, needing the Frenzy Demons to charge and attract the monsters for some time.

"Too bad."

"Tomorrow, there should be hardly any," regretted Su Ziyu.

But the harvest today was decent too, besides acquiring a large amount of Power of Slaughter and Soul Value, a Snake Demon and a Fire Burning Demon advanced to elite units, and the Frenzy Demons produced seven or eight elite units.

The fifth day.

Upon seeing Su Ziyu's group approaching, a ghost lamented, "As expected, they came again! Today they might not be stopped!"

"Must awaken the high-tier undead within the Skeleton Fortress."

At this point, the flame of the Soul Summoning Tower was very dim, Su Ziyu collected only over ten thousand points of Power of Slaughter today, having already set eyes on the skeletal fortress in the valley emitting a sinister aura of death from afar.

Just when the ghost was ready to activate the Withering Array to awaken high-tier undead, Su Ziyu departed with his people again.

"This place must be preserved."

Su Ziyu quietly remarked, "Let it rest for a while, maybe next time it can still be used for grinding."

There won't be many undead for a while.

Su Ziyu hadn't seen the Witch Demon, attacking the Skeleton Fortress was too dangerous, siege battles were hard to win; better to let it rest for a time.

He planned to deal with the Red Dragon.

If the casualties were too high, he could return to grind undead again.

.........

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