Dex and Echidna's POV during the journey:
"The plan is simple, before entering the lair we should throw something like bait to trick it into using its strongest attack, after that we should enter and each of us go to a corner of the..." Dex then stopped and remembered something.
"Finally, you remembered that none of us is a mage like the protagonist, silly," Echidna said seeing him stop talking and feeling the reason for his hesitation from their hand contact.
"Damn! Without a mage to attack its feet from a distance, it will be too fast for any of us to hit," Dex was irritated to realize this only now.
"Even your angry side intrigues me, but luckily I think I have a way to stop it," she said happily while moving away from him.
Echidna was currently wearing practically the same as before: the lower part of her bikini and the piercings that adorned her. But now she also wore a thin robe that looked like black satin, almost transparent, clinging to her body.
"You know, while I was thinking of creating this outfit I noticed something, although the earrings' description said it cannot create something that protects or attacks the enemy..." She started forming something with her hands. "... all the clothes we create will be indestructible..." A kind of ribbon made of the same material as her cloak formed in her hand. "... so we can use them to bind our enemies if we strengthen them with our aura!"
Without a word, Dex approached and observed the fabric she had just formed. He could feel a slight aura leaking from the fabric and touching it he was certain. 'If used correctly it should hold even a third soul user who just leveled up.' He smiled at Echi. "How could I ask for a better, smarter wife than you?"
Echidna, happy with the compliment, puffed out her chest and laughed. "Of course a future queen like me has to be smart."
"Well, then it's decided..."
Dex and Echidna's current POV:
A vortex of pure darkness and purple lightning formed over the demon's body, which was devoured by tentacles with demonic mouths filled with thousands of shark-like teeth.
The energy from the demon, who would be classified as a third soul being if not for its shackles, seemed to strengthen their bodies slowly to better adapt to the demon's powers. To them, it was like being massaged from inside their flesh, veins, muscles, organs, and tendons—all to allow a better flow of the demon king's energy in their bodies.
After this process, the energy that once seemed infinite became almost nonexistent but still fused with the Soul they shared.
Their bodies emitted steam as if they had just come out of an oven.
Panting and still hot, Dex breathed heavily. "What the hell... was... that?"
Echidna, between intense breaths, replied, "Even if small... we went through... a body reconstruction."
Exhausted, Dex took her hand and lay down on the floor, which Echidna also did.
Through their mental connection, they spoke. 'Echi, how did we go through a process of a user who holds their third soul?'
'I said it was just a lesser version, but that might be because he is a demon.'
'But why did his race do this?'
'I dunno, how should I know? I'm not an encyclopedia!'
Dex, somewhat surprised, just laughed. 'Well, I was already thinking so.'
He then added, 'But why did you get naked?'
Irritated, she replied, 'It must be a limitation of the artifact, and I got like this because I used too much fabric. Now stop asking questions and let me breathe!'
They spent minutes on the cold catacomb floor and stayed there for several minutes until falling asleep.
But Dex quickly woke from his sleep and saw Echidna sleeping beside him. 'How can she be so beautiful?' But he quickly realized the situation. 'Focus!'
'At best, I must have slept at least half an hour, so it must be around 3 p.m.' Dex then stood up quietly. 'I can wake her after I get the loot.'
'But first, let's see what changed.'
System of the Ruler of Sins
Name: Dex TunderBird
True Name: Dex Von Velharis
Age: 0 years
Races: Archon of the Original Sin, Primordial Demon Dragon (Newborn.)
Titles: The Reincarnated / The Lord of the Seven Sins (1/7) / Original Sin / Adam
Status:
Strength: D-
Intelligence: E+
Speed: E+
Resistance: D-
Vitality: D
Charm: EX (Sealed for user safety and limited to SSS+)
Auras:
Aura of the Demon King of the Original Sin - Soul level 1
Aura of Gluttony - Shared Soul - Zephyra
Class: Twin Knight
Sub-Class: Ruler of the Sins
Sins:
Gluttony: Zephyra - Full awakening - Bound by marriage (+)
Lust: Selene - Incomplete awakening - Unbound
Pride: Erica - Full awakening - Unbound
Greed: ???
Envy: ???
Wrath: Lyra - Full awakening - Unbound
Sloth: ???
Abilities:
Demonic Soul Realm - The ability produces a mental realm where the user and their sins find it easier to create their first soul and improve it over time.
Aura of the Demon King of the Original Sin - An aura dependent on the user but maintains one characteristic: with each bound sin, the aura grows stronger.
Sin's Authority (Passive) - When facing someone carrying one of the sins, that person tends to display more traits of their sin. It can be controlled but never deactivated.
Demon King Fighting Styles - Whether barehanded or armed, you will master weapons. (Mastery level 2)
Unarmed Combat Style - All parts of the body the host decides to use in combat become weapons infused with the King's aura.
Twin Body - A soul divided into two to occupy two bodies; in this world you are never alone, even if one body dies, it will revive through the living one.
Sub Ability: Eternal Duality - They can instantly switch bodies.
Charm EX: Divine level charm that only Lust or similar sins should achieve in later stages, but somehow the host unlocked it due to mysterious external conditions. It is sealed for safety and limited to SSS+ level.
Soul Eclipse - An eclipse that fuses both parts of the soul and their bodies for five minutes.
Remaining abilities sealed as the host is still a newborn.
'As expected, not much changed except for the unarmed style, but I may still be the first being to have a stat level D while still at first soul.'
But then he noticed something he hadn't paid much attention to before. 'As far as I know, stats stop increasing past SSS+, but I have it at Ex for some unknown reason.'
'I remember it was beautiful before the evolution, but this evolution is illogical.'
'Well, when the encyclopedia wakes up, I can ask her.'
He then advanced to the place where the demon had been imprisoned. And at that same place, there was now a large chest positioned.
The chest was old and rusty, but its contents seemed to be in perfect condition. Dex, standing in front of the long-awaited goal, could only smile. 'I'm sure she'll love it.'
Dex quickly opened it, revealing its contents. The chest seemed half-full of the chains that had once sealed the demon, and atop them was a beautiful ring made of blood gold from the vampire continent, and a beautiful purple diamond characteristic of the elven people. For both cultures, this could be a classic wedding ring, though Dex didn't know that.
"Really beautiful," he thought, looking at the lovely ring. "But it will look even prettier on her hand."
His hand moved toward the ring until he finally reached it. And at the moment he was about to take the ring, one of his fingers lightly touched the chain.
There was an immediate reaction; barely touching the chain made Dex feel an electric current painfully pass through his body.
Hhaaa!!
"What the hell is this?" he thought, feeling the most excruciating pain of his life.
And as if the chain was offended by his screams, it began to climb his own skin and started fusing with him.
With unbearable pain, he couldn't notice two things: first, the person who had been sleeping was now beside him, holding him. Second, a long living tattoo was slowly forming on his right arm.