Harry Potter: Altair Black. Son of Asmodeus

"I thought you were already engaged," said Altair. He ignored Sona's cry, as the girl herself seemed embarrassed.

"I thought you didn't mind stepping on the Phoenix's toes," she replied enthusiastically.

"I certainly don't mind," his eyes slowly scanned the girl's body. "When something is worth it, you can walk through fire to get it," he looked into her eyes, which were blue and beautiful. Not like Azalea's, Potter had blue eyes as clear as the sky. Rias's were a soft blue, almost green.

"I think I need to clear this up first," the girl coughed into her hand. Her cheeks were flushed. "The marriage will be a sham, I—"

"I refuse," he interrupted her.

"Pervert," the white-haired girl looked at him with disgust.

Looking at her more closely, Altair noticed a pair of cat ears on her head.

"If you let me explain," the redhead tried to speak again.

"Enough, Rias," said Sona, adjusting her glasses. "Such a proposal is insulting to Altair," she said with disappointment in her voice.

"I didn't mean to!"

"Can we continue with the negotiations? Unless that's the only proposal you've prepared," Altair wished he had done business exclusively with the Sitris. But including Rias would give his business more stability. "These two notebooks contain the product results," he said, leaving them on the coffee table. Sona took one.

"No. The Sitri family wants to participate. I've spoken with my parents and my sister. They agree, but they have some doubts," Sona continued. Rias seemed sulky.

"What doubts? I'll do my best to answer them," he offered.

"How effective are they compared to normal Phoenix Tears?" asked the girl.

"You should know that I'm not replicating Phoenix Tears, I'm replicating one of their compounds. This compound can be dissolved in a drinkable potion or a topical ointment. The product itself is a powder. My potion," he said, referring to the regeneration potion that brought him to Japan, "can be the vehicle. In that form, it is about ninety percent as efective as a Phoenix Tear."

"Only ninety percent?" said Rias, not knowing what he was talking about.

"A Phoenix tear is twice as powerful as the ones sold by the Phoenix, the family of your future husband." He spoke with a hint of malice. "Even this version is about 1.8 times better," said Altair. The girl looked like a spoiled princess now.

"Will you share the recipe?" continued Sona.

"No. I'll sell the raw material." The process included the synthesis of a compound that he was not willing to disclose. It also required magicians to make it.

It would also give him prestige and make him more valuable to the devils.

"How much could you give us each month?" The girl seemed to have been waiting for that answer.

"Right now, I can give you a hundred grams," he said with a small grimace. "Each 0.8 grams gives the effect I mentioned before. That would be about 125 full doses. These effects come from studies on magicians. I also need to test it on stronger devils. It takes about two grams to have an effect on me, but on stronger devils, it will increase," he clarified with a frown.

His wounded hand healed quickly as soon as he discovered the compound.

"Is strength linked to the dose required?" asked Sona.

"Physical strength. Some magicians are magically stronger than Altair, but the dose for them is still around 0.8 grams," Azalea said this time. Lily proved the Powder.

The girl had read the results a few days earlier, which was why she was interested in attending the meeting. Altair had paid a group of first-year children to test the potion on them. Lily disapproved, but the data was valid.

"These 100 grams could be 50 doses or none at all, depending on the devil," said Rias, frowning. She was now reviewing the pages with the studies on them, showing the difference in strength between ordinary magicians and Altair. It was a noticeable difference, not to mention that there were devils even stronger than him. Thinking of her cousin Sairaorg Bael, probably not even a hundred grams would have any effect on him.

"That's right. It's a hundred-gram sample. Once I establish a line, I can give you about a hundred kilograms a month. I'll increase or decrease production according to demand," Altair continued.

"The dose depends on the healing?"

"No, but if it is oral, there will be a systemic effect. If you use it as a topical, it will be a local effect, but stronger. The same dose will heal a scrape on the knees or reattach a leg that was torn from the body," he said. "Of course, for small wounds, the other potion is still the best option," he added. "It would be a waste to use phoenix powder to heal small wounds."

"Phoenix powder? Is that what it's called?" asked Sona.

"I just thought of it. I think it sounds good," said the boy.

"It's a good name," said Sona while nodding. "I'll give you fifteen thousand galeons for a hundred grams. My family will study its effects and see if it's viable," she made a large offer. Rias's eyes narrowed when she heard galeons.

"I'll trade the money for magic. I want to learn devil magic," Akeno had offered to teach him, but he didn't believe that a servant could know more than one of the pillars of hell.

"I'll give you books based on the value of fifteen thousand galeons," the girl agreed. She would have to check her library and consult with her parents.

"That would be lovely."

"Any kind of magic you're interested in?" the girl asked.

"The basics of devil magic. If you can include their means of transportation," he was curious about how they moved from place to place. "Is there something like runes in devil magic?" he asked.

"There are no runes. Are you interested in magic circles? We use them every day to teleport, but they have other uses," said the girl.

"Add that. When your family approves, I'll ask for more in-depth knowledge. I won't try to take your family secrets," he clarified at the end.

"You seem pretty sure they'll accept," said Rias this time.

"They will," Altair said confidently.

"What if they need a kilogram to heal an exceptionally strong devil?" asked the Gremory girl.

"Then demand will increase. If it's necessary to industrialize the method, I'll do it. If the devils need tons, I'll take care of producing them." He already had equipment in mind if necessary.

"Then how about a bet?" said the girl, raising her arms under her breasts. "If in a month, produce a ton of that powder. If you succeed," she looked at his eyes, which were lost in her breasts. for a second, "I'll give you the support and protection of the Gremory family and... my virginity," she said, her cheeks flushing.

"Are you sure?" he asked.

"I didn't say I'd win if I lost," the girl smiled.

"What do you want in the miraculous event that you win?" he asked sarcastically.

"Her," her slender finger pointed at Azalea. "I'm missing a bishop, I want her to be one."

"Why don't you just go to hell?" Altair couldn't help but frown. "If you think she's a piece in some damn game between us, you're an idiot. I would never bet a human life other than my own," he spat with contempt.

The room fell silent. Rias stared at him with wide eyes. Even Sona and Akeno. Kiba and Koneko frowned, both ready to defend their king.

Rias was stunned into silence. Her opinion of the wizard had changed dramatically, for better. He didn't see Azalea as Riser sees his harem. He seemed to care about the girl beside him. She did not doubt that Riser would have put all his nobility on the line if he were him.

"I'm sorry about that," she said as he stood up. "In that case, let me change my request," she spoke, looking a little embarrassed. "You wouldn't bet a life that wasn't yours. Then bet that. I want you to be my Bishop," she looked him in the eyes with fervent fury.

"In that case. Isn't it fair that I ask for the same?" Altair said. His purple eyes flashed. "I don't have my Evil Pieces yet. But when I get them, you'll be my Bishop," Rias blinked, but smiled. She couldn't see how she could lose. The boy was a genius, but she didn't think he could win the bet; a month was too short a time.

"I accept," the redhead held out her hand. Altair stood up and walked toward her, circling the table. "I've met a lot of talkers," she said as she took his hand in a gentle squeeze. Rias noticed his hard skin. She noticed that his hands were much bigger than hers.

"Do you bet your virginity often?" he asked, catching her off guard.

"This is my first time," she replied instantly.

"It will be the last." He leaned close to her ear to speak: "When you become my Bishop, I'll make you honor your initial offer." Rias smiled nervously.

"You won't succeed," she said, her voice trembling with excitement.

[Mission obtained: Devil Princess]

[Objective: Win the bet and add Rias Gremory to your coven]

[Rewards: Physical stats: 20. Status points: 100, SP: 1,000,000]

'I think this is the easiest mission I've had so far.'