New Forge.

While Hecate went and got her massive bath ready, Constantine picked Medusa off the ground. As he looked at her he could tell that thanks to the Curse that had been purified and fused with her heart as a Dragon Heart, she had now become a unique being. 

Vritra being a Dragon and Asura meant she was now part Asura as well. He imagined a six-armed version of her Divine Gorgon form kind of like Daemon Primarch Fulgrim, but with six swords instead of four. 

He smiled as he would forge some really good swords once he learned how to. Athena at this point must be raging at the fact one of her curses was repaired. She couldn't even tell who did it or where. Not even who had been cured as Hecate had managed to hide even that. 

He walked over to his bed and placed her down on it. Vritra flicked his tongue as he looked at Constantine. 

"Have fun."

He slinked off his neck before coiling like a serpent on the bed. 

"I will rest here and look after her. You go enjoy your 'bonding' time with your mom." 

Constantine shook his head as he walked out of his room. Not long after he heard Hecate calling him to her room. 

"Constantine, you can come in."

When he entered her room, he saw steam coming from her bathroom. He removed his shirt and his shorts, but he kept his boxers on. When he walked inside the large luxurious bath, he saw Hecate in neck-deep water filled with pink and purple bubbles. 

When she saw him she swam to the edge of the pool before emerging exposing her lust-provoking body. Since the gods could shapeshift, she had made herself as sexy as possible. 

"My, my, your outfit from before doesn't do you justice. You do have an incredible body, my son." 

"And so do you, Mother." 

He stripped his last piece of clothes before he got into the pool. When that happened, Hecate swam next to him before she began to run her hands across his chest. His 11th birthday was in 3 days, and despite that, no human could claim to have a body like him. 

"I was right, you're more god than any Demigod before you. Nike's and Ares' inheritances did make you incredibly resilient." 

He smiled as he looked at her plump breasts. 

"The Dragon and Asura aspect of it made that even stronger. I can survive wounds that would kill a normal Demigod." 

Suddenly, Hecate's hand started to trail lower.

"Keep touching me like that and I might get a bit, rough." 

When he said the word rough a bit of a draconic growl came through and it just made Hecate smile in a lewd way.

"Maybe I want you rough. I am Greek and we love a good time. Even better if we are related." 

She pressed her breasts into his arm as he reached around and placed his hand on her hip. 

"Relax, still 10." 

She pouted when she heard that. 

"Fine, you are such a tease." 

"Hey, it will feel better when you give me a few more years of growth down there. I ain't small, but it certainly isn't as big as it will get. Remember my great-grandfather? That is how tall I will get if not more."

Hecate did like the sound of that. 

"I can wait, taking your first time on your birthday will be a sweet present to you and me."

'Damn, Greek gods and goddesses are horny.' 

Once she stopped trying to get him to fuck her, they just enjoyed a regular bath. This was the first time he had bathed like royalty, but it was nice. The water was even infused with magical herbs that invigorated him in more ways than one. 

While they didn't have sex, he did pop a boner so Hecate helped him out by giving him a handjob underwater. His first sexual experience in this world and it was his horny Titaness Milf Mom who did that. 

He felt like he was in DxD rather than Percy Jackson. When their bath ended and they were getting dressed, Hecate grabbed his face leaned down, and kissed him. 

"Good night." 

"Night." 

When he left her room and entered her room he saw that Medusa was running her hand through her long luscious hair once more while looking in a mirror. Though, with just a thought her hair turned into serpentine dragons that hissed and growled. 

"Enjoying that."

She jumped a bit in surprise. 

"Master." 

She stopped and turned around to bow to Constantine. 

"Relax, I won't make you bow all the time. Instead, as soon as you get used to this state I will begin your training. As my Assassin to kill Demigods, Monsters and People I feel will become a nuisance. Do you mind that?" 

She shook her head. 

"No, I have killed for less and Demigods have wronged me throughout history. I will not hesitate." 

"Good, from now on never tell someone your name as Medusa. If you must introduce yourself, to an enemy yourself Assassin. Nothing more, to prepare you for that job I and Vritra will personally be teaching you the magics and skills you will need for that. 

I will forge weapons made to not just disperse the essence of monsters, but to end them. Eventually, when I feel you are ready, you will assassinate Athena. Poseidon though, is my target. I will incinerate his kingdom, dry out the seas as Vritra did." 

Vritra smiled as when he used his Asura and Dragon Powers simultaneously he dried out the entire Indian subcontinent of Water. It was why Indra fought a war against the Asura gods and killed him to free the water.

Vritra did bring this up. 

"Make sure you use this power of mine when you do fight Poseidon and drag him out of his element. Though, you better be careful that this world's Indra does not come for you again." 

That reminded him of something. 

"Speaking of this world's Indra, what about this world's Vritra?"

Vritra hummed. 

"We could use the Absorption Aspect of my power to drain this world's Vritra's Essence to enhance our power." 

"Not just that, we just have to be patient for the plot of the Lightning Thief to start. Once that occurs, and Luke steals the Master Bolt, we swoop in, steal it before Ares does, and use the Bolt in a ritual to enhance our resistance to Lightning. 

Dealing a blow to Zeus before we even fight him. It will also protect us against Indra as we don't want a repeat of what happened to you last time." 

"Now that is a fact." 

Medusa who heard all that of that was confused. 

"What?" 

Both Constantine and Vritra turned to her. 

"Don't worry about it."

"Alright, I won't." 

Constine clapped his hands and his ghost maids appeared in the room. 

"Yes, Lord." 

"Ladies, I need you to prepare the room next to mine for my servant." 

They bowed before flying through the wall to do that. With his order given, Constantine walked over to his bed before lying down. He had been moving around all day and he deserved some rest. 

He would not get to rest in the foreseeable future so he better get used to this. Once Medusa's room was prepared she was led there by Constantine's maids. As for Constantine himself, he allowed himself to fall asleep. 

The Underworld had no day and night, but his internal clock woke him up at 6 AM on Earth. When he woke up, the first thing he did was begin to lay down the Formations and Wards on his rooms to increase the space to allow him to set up new rooms. 

One would be his training room where he could train himself and his future servants like Medusa. The other would be his library where he could research magic and find new ways to use his powers. 

The other would be his forge room, which would be set up today. He also decided to set up a stable for Solomon where the horse could relax and do whatever he wanted. He placed as many Anti Divination Charms, Wards, Glyphs, and Runes to ensure that he was free from the sight of the gods. 

Later on, he planned to tattoo them onto his skin, but he wanted his Mother to do them. Speaking of his Mother, she came into his room as she loved seeing the new magics that Vritra and Constantine made or knew. 

While Constatine and Vritra worked, a team of undead skeletons and ghouls walked into his room and began to set up a forge in the room he set aside for that purpose. In the Underworld, the Smiths were all Skeletons much like Vamos from Dark Souls 1.

The weapons of the armies of the Underworld are forged over flames of black flames infused with the energy of the Underworld while using hammers fashioned like metal skulls.

The still-hot weapons were then cooled in the River Styx granting them incredible power. Though, when Stygian Iron was forged in this way it gained the power to absorb the souls and essences of monsters and immortals. 

The Undead worked quickly and set up the forge and they even gave him several tons of raw Stygian Iron. When he saw that, he was itching to get started. He may not be a son of Hephestus, but a Warrior should learn to make their weapons. 

When Hecate saw the forge, she nodded as it was of exceptional quality.

"So what do you have in mind." 

"Before I do anything, I want to practice with the Celestial Bronze I have as I have plenty. I did take the Prototype of Talos I have tons of Celestial Bronze to practice with. I do have to melt it down and see what effect the flames of the Underworld mixed with Vritra's Cursed Eternal Flames have on Celestial Bronze. 

Then I have to get the mixture right as I try to alloy Celestial Bronze and Stygian Iron. I also have to compare what effect quenching in my blood vs the River Styx and then I have to get the enchanting and runes right. 

Forging is a subject as complicated, but as crucial as magic is." 

Hearing that made Hecate smile. 

"Research is in our blood, son. I will leave you to it since I can tell you will be busy. Make sure to set time apart so we can have a meal together." 

"Alright." 

Once Hecate left, Constantine opened his backpack and began to pull out Celestial Bronze items starting with defective swords, knives, shields, and even the bronze tree he shopped down. 

Vritra flew into the room before coiling around Constatine's neck as he liked to do. 

"Going to start forging?" 

"Yeah, I have an idea to reforge Spine Splitter into a true weapon for me. I also have to make my armor and Solomon's armor. Speaking of Solomon, HEY! GET IN HERE!"

Solomon walked into the room still burning with cursed black fire. Constantine removed his shirt as he was going to be sweating. He walked toward a large furnace that just needed to be fired up. 

Before he did anything, he wanted to take the time to create something he learned about in a novel. A Fire Seed that would contain the concentrated fire of a creature or unique type of flame. 

In this case, Vritra's Cursed Eternal Flames and Solomon's Flames. He would mix that with the Black Fire that the forges of Hades used and he would research what effect it had on Celestial Bronze. 

He also would need to use a regular human foundry he would enchant with magic to compare. One day he wanted to take a trip to the Norse Pantheon to learn from Brok and Sindri who made Mjolnir for Thor Odinson. 

Since he also collected many Olympion Computers, and Automatons made by Hephaestus he wanted to see if he couldn't make his own Vargard Obyron Lich Guard from Stygian Iron and Celestial Bronze. 

If that worked maybe even a Android 2B since any man of culture would want that. Until then, it was time to prepare to craft the weapons and gears that would grant him the title of The Black King.