The combat strength of a controlled undead army was worlds apart from that of an uncontrolled undead army.

These skeleton soldiers and ghosts that drilled out of the ground had always been fighting separately. They were only instinctively attacking Roy and the others out of envy and hatred for the living. Such attacks could be said to be chaotic and posed no threat.

On the contrary, when Cassandra appeared, the undead army she controlled displayed great combat power.

She arranged all the skeleton soldiers in a dense formation, firmly blocking in front, forming a dike of bones. The undead that drilled out from underground were smashed into pieces one after another against the dike. Under her control, her skeletons could actually work together to fight. Every time an enemy rushed forward, three or five skeleton soldiers would charge at it, using the rusted weapons in their hands to attack different places on the enemy. In the blink of an eye, they could cut their opponents into messy bones.

Although the skeleton soldiers were the lowest-level undead and their attacks were not surprising, under Cassandra’s control, there were not many losses after clearing out all the skeletons underground. This result made Roy sigh in admiration. This art of commanding an undead army seemed to be the natural instinct of a lich.

After confirming that there were no more undead creatures, Roy said in satisfaction, “Let’s go. Let’s get out of here!”

Everyone began to set off. However, because of Cassandra and her undead army, Roy, Julia, and Fat Tiger no longer flew. Everyone sat on Fat Tiger’s back, and Fat Tiger carried them forward, while the skeleton soldiers and ghosts followed Fat Tiger.

Of course, the ghosts did not need mentioning. The skeleton soldiers were only bones, and they were naturally very light. Therefore, even though they were moving forward on foot, the entire army was not too slow.

Moreover, undead creatures did not eat and drink and would not feel any fatigue, so they managed to walk more than a hundred kilometers in the desert overnight.

But after daybreak, they had no choice but to stop. Undead were afraid of sunlight, so they could not let the troops move under the sun. Thus, Roy and the others could only stop.

Roy initially wanted to create a frost fortress to block the sunlight, but the consumption of magic power in the desert environment was too great. In the end, Cassandra volunteered to use magic to create a Cover of Darkness to block the sunlight and protect the undead army. Of course, after stopping, Roy and the others did not stay idle. Julia and Fat Tiger flew in one direction and explored the surroundings. A large number of undead had appeared in the oasis earlier, making Roy certain that there might be other places of death in the desert. Although Cassandra controlled many skeleton soldiers, honestly speaking, these low-level undead did not have much combat strength. Roy wanted to see if he could find any high-level undead for Cassandra to control.

Roy stayed. The Cover of Darkness was a dark mist, and sunlight could not shine in. Roy felt very satisfied. He took this opportunity to ask in detail how Cassandra lived after he left the Pirates of the Caribbean world.

After asking, he found out that Cassandra had been in the Pirates of the Caribbean world for more than twenty years!

“Master, after you left, I’ve been staying on Frozen Island!” Cassandra explained. “According to Master’s agreement with the sea goddess Tia Dalma, I can’t leave the island, but I have the right to deal with all the ships and sailors who barge into Frozen Island. For more than twenty years, I can’t even remember how many people have intruded on this island. I relied on the souls of these people to strengthen my magic power little by little to this extent.”

Cassandra’s words were simple, but in fact, in the Pirates of the Caribbean world, the notoriety of the robed Lich Cassandra had spread throughout the entire world. In addition, in the human rumors, Demon Osiris was still sleeping on Frozen Island, and Lich Cassandra was guarding this treasure of the Lord of Darkness and Winter. And thanks to the gold of misfortune that Roy had spread out, people believed that there was an immense amount of gold and wealth on Frozen Island. This wealth was so great that it was enough to buy all of England!

Precisely because of this, Frozen Island gradually became a place of myths like the Fountain of Youth. Although many people had accidentally intruded on Frozen Island because of storms, there were more greedy people who coveted the wealth of the demon. Among these people, there were pirates, adventurers, and the troops of various colonies. Although everyone who reached Frozen Island had their souls taken away by Cassandra and became unable to return, such a forbidden land of death still could not stop human greed. Every year, Cassandra would harvest many souls.

Cassandra used the souls to train undead magic and strengthen magic power while she awakened the remains to become an undead army. Now, on Frozen Island, Cassandra was not alone. She controlled a large number of undead troops, and she had even repelled three waves of the church’s crusades against her…

Cassandra had taken away a large number of souls at sea, and they could no longer be guided into the Sea of the Dead. Although Tia Dalma had an agreement with Roy, she had no choice but to make some restrictions on Frozen Island secretly. Nowadays, there were enormous sea storms all year round around Frozen Island, and the weather was indescribably bad. Tia Dalma used this method to limit people from searching for Frozen Island as much as possible.

Of course, Cassandra would not mention these things to Roy. After all, she was showing off. But Roy still probed and found some clues. He sensed Cassandra’s current magic power and found that her current magic power level was at the level of an upper-middle-rank demon. Given some more time, she might be able to break through to the high-rank demon level.

At that time, Cassandra would become a lich master…

Of course, Roy was a demon, and the priority of the souls they obtained naturally belonged to him. He could not give too many souls for Cassandra to advance, but this was the Heroes of Might and Magic world. Necromancers were unique existences in this world, and there were many treasures created by necromancers in history. If Roy needed to improve Cassandra’s strength and get her to control as many undead as possible, it was the right choice to work on these undead treasures.

For example, there were the Shield of the Yawning Dead, Skull Helmet, Dead Man’s Boots, Staff of the Netherworld, Ring of the Unrepentant, Cloak of Death’s Shadow, and so on. As long as he could obtain similar treasures and equip Cassandra, she would become stronger…

Julia and Fat Tiger returned not long after, but they did not discover much in the surroundings, so Roy did not have them go again. Everyone stayed in the Cover of Darkness, waiting for the sky to turn dark.

During this time, Roy began to read the books he found in the library of Ulambus.

Demons were born with the ability to use their magic power. This talent was extremely powerful, and there were even rumors in certain worlds that the magic of humans and elves originated from demons.

However, Roy knew very well that this was not the case. The magic power circuits in the bodies of demons belonged to source magic. It was easy for demons to use source magic, but if it was not source magic, even demons needed to learn it.

The mages of the kingdom of Bracada were scholars who specialized in magic, and their research was also very fruitful. Roy saw their research on magic power in these books.

Scholars believed that the power of magic power was actually a medium for communicating with and invoking the various elements in the natural world to achieve the goal of using and forming magic. The strength of magic power determined the efficiency of this communication with the elements. For some powerful magic, if the efficiency of magic power communication was low, they would need to use incantations or rituals to assist…

Roy read these books with great interest. Although he did not know the characters of this world, it was not a problem with the system in his hands. Roy directly made a ‘Translation Gummy’ and ate it, and it was all resolved…

From today onward, you can call me Royaemon! Roy thought proudly. While Roy was trying to learn some of the unique magic of this world, he did not know that the oasis they had passed through earlier welcomed a new batch of guests…

This group of guests was also an army of undead shrouded in a Cover of Darkness. But unlike the Cover of Darkness made by Cassandra, the one covering this undead army could actually move along with it! It was obvious that the person who released this Cover of Darkness could use this magic much better than Cassandra.

And this undead army had a composition completely different from the skeleton soldiers and ghosts controlled by Cassandra. Among this undead army, there were not only low-level undead like the skeleton soldiers and ghosts, but there were also high-level undead such as mummies, vampires, death knights, liches, wights, and so on. The most eye-catching ones were the dozens of giant bone dragons with tattered wings flying in the air above the army!

These bone dragons were special undead creatures formed from countless dragon bones. They were powerful undead at the top of the pyramid of undead creatures. The empty eye sockets of the bone dragons were burning with the flames of death, and just looking into the eyes of these dragons made people feel boundless fear.

Not only did this undead army have a large number of high-level undead, but its size was also enormous. The person leading this shockingly powerful undead army was a necromancer at the front. He rode an undead warhorse with four hooves exuding the aura of death, and on his shoulder was a scythe with a skull on it. He was wearing a black robe and a cloak, and under the hood was a large spider tattoo on his forehead!

Arantir, recognized as the strongest death lord in the necromancer kingdom of Heresh, had appeared in this oasis with his army…