The Invincible Full-Moon System

Letting out a thunderous roar, he landed an axe kick that send Elder Tilrith to the ground.

Elder Tilrith was blinded by the flash of light before being hit.

It was his first time using the Spirit Amalgamation spell that he learned a while ago. It's a spell that combined two different elemental spells into one attack and also increases the spirit energy output by 100%.

Since he now has two perfect spells to try out, he decided to use Spirit Amalgamation.

Unsurprisingly, the spell proves to be quite effective. By combining the Lunar Insadescent Axe and Ether Blink, he was able to catch Elder Tilrith off guard and send her crashing into the ground powerfully.

A huge crater was created with Elder Tilrith sprawling at the center.

Despite the powerful kick that even managed to crack some of the armor on the back of Elder Tilrith's neck, the demonic energy around her is still blazing and is even becoming more intense.

Getting back to her feet, Elder Tilrith started laughing out loud with her melodic voice.

"I can feel your burning vigor, Royal Black Prince. For you to come here and declare that the Executor is your prey, then you must've really hated the Fifthborn, huh?" Elder Tilrith said before Rex landed across her once again.

Rex smiled when he heard this, the wounds on his body started to recover slowly.

"Of course, I'm not going to let you kill the Executor first. I am the one who's going to kill him, and if any of you decides to step in my way, then I'll be forced to kill you too" Rex declared overbearingly, letting his intention known.

Nobody would take the opportunity to defeat the Executor from him.

Every single thing that the Executor has done to him will be paid back tenfold, Rex already promised himself that he will triumph over the Executor, and make him a stepping stone for power as the System said.

Listening to this, Elder Tilrith covers her face with her claws.

Pondering for a second, she then waved her hands in hubris, "I'm done here, good luck"

"I'm going to watch from the side, so don't die now, Royal Black Prince. I'm still holding back, but the others might not be holding back" She added before walking away, waving her tail left and right.

Upon hearing this, Rex nodded his head before a blast hits him from the back.

Boom!!

Rex got flung forward and even spins in the air a couple of times, he needs to explode his kingly energy to stop the momentum and landed back on his feet. Raising his gaze, he saw his next opponent stepping up.

"It's time for you to die, Royal Black Prince..." A rasping voice reverberated in the air.

An endearing voice that is inhuman and is definitely capable of striking fear in anyone that hears it, his next opponent is the one that looks at him with malice from earlier, hatred can be seen in its red light eyes.

The Undead Elder is his opponent now, Elder Noskear.

Looking at her stats earlier shows that Elder Noskear is a menace in terms of Undead magic.

Possessing more than 40,000 intelligence stat points after the First Breath ensued is absolutely terrifying. The First Breath should've definitely weakened Elder Noskear more than the others, yet she retains her intelligence stat that high.

Even Rex only had about 25,000 intelligence stat points after the First Breath.

Despite the fact that he's a ninth-rank realm in his sky-black lightning element, being an Exalted race from having two elemental spirits inside of him, as well as having multiple elemental affinities, two of them are quite developed.

"I've never thought that the Undead Elder bears hatred for me" Rex said with a smirk.

Upon hearing this, Elder Noskear also puts on a creepy smile, the death energy around her is sizzling like black smoke that amplifies her intimidating presence, "Someone like you wouldn't be able to defeat the Executor, I suggest to repent because the Netherworld will have your soul..."

Not even intimidated by her words, Rex kept the smirk on his face.

"Yeah? Why do you think that I can't beat the Executor?" Rex asked, entertaining the flow.

But the question spark Elder Noskear to shoot her pure death energy into the ground, as she's a Death Knight, she has access to the death energy inside the Netherworld. It kept becoming strong with each second passing by.

Rex looks at the ground and finds two circle formations starting to appear.

Intense with pure death energy, almost as if these two circle formations are a getaway to the Netherworld itself, the paradise for the Undead. "Your sin... killing an Enchanter and slaughtering thousands. It's unacceptable, so you won't be able to defeat the Executor because you're going to die here..."

"Tribute to the Nether Goddess of Fecundity, Blessed Undead, the Rasphest Twin!"

Shingg!

Although he doesn't know what the Elder is doing, each of her words trembled his heart.

Despite the eeriness and whispering tone that Elder Noskear is using, her words seem to be echoing inside the ears as well as echoing in another place, seemingly calling for something from a forsaken place.

'Necro Lich, she must be a Necromancer, calling forth summoning is her forte' Rex thought.

Among the Supernatural races out there, he was more familiar with the Undead than any other one, save for the Werewolf. He had more knowledge of the different types of Undead and their cultural and religious beliefs which he had used to his advantage during the mission to fend them off back then with the descendants of the 25 Golden Crest Families.

It was thanks to that, he knows Elder Noskear's power is going to be summoning.

Just as he predicted, the two circular-shaped formations radiated with pure death energy that exploded with rigorous power, sending rays of black force upwards and engulfing everything in a deathly chill.

A chill that could even penetrate Rex's skin easily, and make his body slightly shiver.

Crawling out of the forsaken portals that the two circular-shaped formations created were two creatures, their skin is a green hue and decayed, powered by the pure death energy from the Netherworld itself.

Roar!

Growl!

One of them, the one on the right was unstable, roaring and growling like an animal.

Upon managing to squeeze itself out of the forsaken portal, the one on the right slowly raises his gaze as his entire body is now exposed. A six-armed huge and gnarly hunchback zombie, his face is the epiphany of grotesque, and his spines are sticking out sharply on the back.

<Rasphest Twin - Varianus>

Race: Nether Zombie 

Power: Seventh Rank(Peak) - Nether Weapon Conjurer

Mental: 8,500

Strength: 27,300

Agility: 12,500

Endurance: 25,100

Intelligence: 0

From the overall stats view alone, it's clear that this Undead is made for a physique battle.

Not even wasting a single second, Varianus that has nothing but crazed and anger inside his dead eyes charged forward like an animal, sprinting with all of its arms and didn't show any kind of caution towards Rex.

Leaping when he reaches Rex, he then tries to punch Rex with three of his fists.

Although Varianus seems to be strong as its stats even almost match Rancaladra from earlier, Rex doesn't view anyone as strong if they are in a berserk state like this. It's simply not a problem for him.

Dodging the reckless punches, he grabbed Varianus by the face and slammed him down.

Crack!

Fighting in a berserk state is similar to fighting an amateur, there's no technique and is always been easy for Rex to take care of something like this. Not stopping at that, Rex turn his hand into claws and jabbed it into Varianus' chest roughly.

Green blood squirted to his face, but he didn't care and lifted Varianus off the ground.

Rex's body then slowly makes cracking sounds as he started to transform into his Werewolf form, closening the mass size between the two of them before he threw Varianus back to the ground and started pounding him repeatedly and brutally.

Under his ground technique, Varianus wasn't able to do anything to retaliate.

Even though he has more arms than Rex, four of them have been taken out easily as Rex breaks them and rendered them useless. It was a horrifying sight, and the fight was more brutal compared to the one he had with Elder Tilrith.

Considering that this Zombie went ahead and fought him head-on, it's only natural.

Elder Tilrith herself knows that if she recklessly threw herself at Rex then she will also be susceptible to this situation, the confidence from Rex shouldn't come out of nowhere, and that makes her always mind the distance between them.

It was Varianus' mistake, but he's mindless, and probably can't think properly.

But as Rex was about to end Varianus' life and move on to the next, a melodic hymn that comes from the vibration of strings enters his ears, and this makes him pause for a second to look to the side.

Standing on top of the other circular formation was another summoned Undead.

Another female figure Undead with greenish skin, but this one is more humanoid, taking the figure of an actual human woman with very long black hair that flutters almost like in water and pointy ears. Clad in a black flowing dress, and her eyes were covered by a black intricate eye cover.

She is playing a blood-red violin which is the source of these comforting hymns.

<Rasphest Twin - Montana>

Race: Nether Zombie 

Power: Seventh Rank(Peak) - Nether Musician

Mental: 13,000

Strength: 100

Agility: 32,000

Endurance: 2,000

Intelligence: 28,100

Watching from the side, the other Elders chuckled when they saw this.

Elder Tilrith was one of them as she was surprised to see the Undeads that Elder Noskear summoned, quite notorious summoned Undeads that many of the higher-ups would recognize.

"Is that the King and Queen of the Elven that we killed?" She asked with a light smirk.

Upon hearing this, Elder Nolacula also nodded his head in confirmation, "Yes, I believe those are Varianus and Montana. Noskear took their corpses and turned them into her puppet, but I've never seen her using them"

"Seems like Noskear really wants to kill the Royal Black Prince" Elder Enima chimed.

Glancing over at the Elder of the Shapeshifter, Elder Nolacula, and Tilrith raised their eyebrows in question. "Have you seen them being used before, Elder Enima? Do you know of their powers?"

"Yes, they are Noskear's favorite because those two are quite effective" Elder Enima replied.

Witnessing the fight in front of him, he then continues, "Varianus, like when he was alive is the brawler of the two, he has the ability to become stronger and stronger the more damage he was suspected to. Of course, this is not a good ability if the enemy is able to kill him in one shot. But that's where Montana came in"

"Montana's music can heal Varianus endlessly, as long as Noskear has energy then she wouldn't stop. On top of that, Montana could also revive Varianus if needed. One might be useless without the other. But if the two are summoned... they will become an unstoppable force"

"Summoning both of them requires immense energy, Noskear is burning herself right now"

Listening to this, Elder Tilrith and Nolacula could only shake their heads.

It seems the killing of the Enchanter that Noskear talked about really hits her deeply, maybe a student of hers got killed. If not for that, then she wouldn't go to this extent just to defeat the Royal Black Prince.

Based on what Enima said, she's even burning herself right now to summon the twin.

Fixing their gazes back at Rex who is dazed by the music done by Montana, the Elders watching from the side started to become curious about the outcome of the fight. In their eyes, this is only a test for the Royal Black Prince.

Aside from his arrogant demeanor, he didn't request anything outrageous from them.

Of course, they don't mind accepting.

Because of that, Elder Tilrith was not going all out as if she wanted to kill the Royal Black Prince. But Elder Noskear on the other hand, she seems to really bore the intention to kill the Royal Black Prince. 

"Now, what are you going to do, Royal Black Prince?"