"I-I l-lost to a human?" Inside the crater, the Demon Duke was laying down weakly while looking at the bright moon in the sky.

His eyes moved to the silhouette who was standing at the edge of the crater, "How is this possible? How could a human defeat me?" Terion questioned himself.

*** ***

Tang Shaoyang was happy to accidentally trigger the Fusion Skill. This was a crucial discovery for sure. He did not expect to trigger the Skill Fusion this way.

"I should do some experiments after I am done with the cleaning," Tang Shaoyang muttered in a low voice. Then he heard Terion's voice echoing in the crater. He then came down into the pit and landed next to the Demon Duke.

"Why can't a human defeat a demon?" Tang Shaoyang clicked his tongue as he looked at the magic circle that appeared on Terion's forehead.

Unfortunately for Terion, Tang Shaoyang did not have the intention to make a contract with him. He had two Demon Spirits, or maybe three with Aerelion the Dark Wyvern. It would take him big resources to nurture the spirit.

Tang Shaoyang extended his hand toward the demon and cast the skill.

[Do you want to sacrifice Grade S Spirit, Terion the Demon Duke? Yes/No?]

[You have sacrificed Grade S Spirit, Terion the Demon Duke!]

[You gained 20 levels and a random skill of Terion the Demon Duke!]

[You obtained a new skill, [Mirage Stride]!]

[You gained 20 Spirit Power!]

"20 levels for Grade S Spirit… not bad…" What interested Tang Shaoyang was the skill. From the name of the skill, it should be another movement skill.

"4 million zombie corpses left, should I double down? Or add another million to try it out," He still wanted the Grade S Spirit. The right move was to use the remaining zombies for the sacrifices, it was bold. He was sure that four million zombie corpses should be enough to summon Grade S+ Spirit.

While Tang Shaoyang was in dilemma whether to use the remaining zombies or not, he got a call from Wen. Wen should know that he was busy with the summoning, he should send texts instead of calling him directly. However, the fact that Wen chose to call him, indicating something urgent.

Tang Shaoyang answered the call, "What's wrong, Wen?"

—The zombie armies are coming to Hangzhou city, My Lord. Many, more than the zombie armies in the city! From my estimation, the zombie armies will reach the city in half an hour!

Tang Shaoyang's eyes shone, he was thinking of the sacrifices yet the zombies came for him.

"Alright, you can go back now! We will fight them outside the city!" After that, he closed the call.

"Should I summon another spirit?" With the incoming zombie armies, he did not need to worry about the sacrifices.

However, he was concerned about the strength of this Grade S+ Spirit. What if he was equally strong with the Grade S+ Spirit? He had a battle in half an hour.

"Nah, let's use the zombies for your advancement, Teacher!" Tang Shaoyang decided to use the remaining zombie corpses for Zaneos instead.

—First of all, you should call me by name, Master. Second, if you really want Grade S+ Spirit, you can use the remaining zombies for Bronson or Aerelion. They have a big chance to advance to Grade S+ Spirit instead of me.

"We don't know how many sacrifices are needed for Grade S Spirit to advance to Grade S+ Spirit, four million zombie corpses might not be enough. Since you have admitted me as your Master, you should listen to me from now on!" Tang Shaoyang grinned in response.

From the air, he cast [Spirit Advancement]. In three minutes, he heard a notification.

[Your Grade B+ Spirit, Zaneos the Demon Swordsman has advanced to Grade A Spirit!]

[Your Grade A Spirit, Zaneos the Demon Swordsman has received enlightenment!]

[Your Grade A Spirit, Zaneos the Demon Swordsman has received a new title, Zaneos the Demon Swordmaster!]

Tang Shaoyang did not know how many zombie corpses were consumed for Zaneos to advance to Grade A Spirit. But he was glad about the advancement. He was about to continue the [Spirit Advancement], but he could not use it on Zaneos again.

[Your Grade A Spirit, Zaneos the Swordmaster is in a deep slumber to assimilate with the new enlightenment!]

[Spirit Advancement can't be used on Grade A Spirit, Zaneos the Swordmaster!]

Tang Shaoyang was glad about the enlightenment, but it was a pity that he could not use [Spirit Advancement] on him anymore. This meant, only three remaining spirits could use the [Spirit Advancement].

Yowe the Undead Lancer, Bronson the Knight Slayer, and Aerelion the Dark Wyvern.

"Let's strengthen Yowe first then," Yowe was the weakest. With the sacrifices, he hoped Yowe could advance to Grade A as well.

—Thank you for your reward, My Lord!

Yowe's grateful voice transmitted through his head. Another three minutes passed quickly, during this time, he noticed through [Dragon Sense] that the people who watched him had gone back. They must receive the call about the attack.

[Your Grade B+ Spirit, Yowe the Undead Lancer has advanced to Grade A Spirit!]

[Your Grade A Spirit, Yowe the Undead Lancer has received enlightenment!]

[Your Grade A Spirit, Yowe the Undead Lancer has received a new title, Yowe the Undead Elite Lancer!]

He could still see the zombie corpses through the [Spirit Eyes]. He did not hesitate to continue the [Spirit Advancement] on Bronson the Knight Slayer.

—This Bronson is grateful for your Grace, My Lord.

Bronson's voice transmitted in his head. Tang Shaoyang merely nodded from the outside.

[No sacrifices are detected, [Spirit Advancement] can't be activated!]

More than ten million zombie corpses had been sacrificed. It was a big gain for Tang Shaoyang. He had advanced becoming [Spirit King] and also two new Grade S Spirits.

"The upgrade is complete, it's time to test it out on the battlefield! The zombie armies are the best target to test my new power!" After saying that, He headed to the main camp.