Author note:
Not sure if this should be considered a side story or not. Basically the 'how to make a phoenix' chapters are about Dio's mom making a phoenix, be warned that they are messed up for lack of a better words. She is a proper magus who gives no sh*ts about the means as long as her end is fulfilled. If you hate magus with passion... well this entire fanfic probably isn't for you, but this chapters specifically will definitely make you hate them more.
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Inside a dark lab of Atlas, a red-haired woman was standing in front of countless corpses of different animals, carefully watching the all before turning around with an annoyed expression.
The corpses all had been burned, leaving behind nothing more than blackened salutes of what they used to be.
"Damn it..." she muttered under her breath. "Why are phoenixes so hard to make? Can't animals just not burn?" she asked with an angry tone before chuckling slightly. "Sigh, looks like that brat has given me some of his mannerisms, I didn't curse this often for example."
"So... y-you are not just a psycho, you are... also a terrible mother?" asked a chained man while chuckling. Blood flowed from his body and his skin had a charred look.
The woman turned around to look at him. "Huh, so you are still alive? I didn't give you a ring this time but I guess I didn't burn you enough to kill you either..." she said while grabbing a notebook and getting closer to the man. "No... that's not it. You are alive because you survived being burned alive right?" she asked rhetorically, a smirk appearing on her face. "Wonderful..."
The man looked at her with hatred in his eyes. It had been a while since he woke up here and this crazy woman had been experimenting on him without rest. He lost track of time since he never saw the sun, however eh knew that it must have been several days. "You... still haven't had... enough?" he asked angrily.
"Huh?" asked the woman confused. "Your tongue is fine, even though you had your mouth open while screaming, why is that?"
The man continued to stare at her angrily. He was already nearly blind, his eyelids had burned away and his eyes were badly damaged, however he was still able to make out silluetes for some reason.
"And your eyes too.... how fascinating. Is there anything special about your eyes and tongue? No, your lungs appear to be fine since you are not having much trouble breathing despite the amount of smoke you must have inhaled..." continued the woman, still writing down things in her notebook. "Very well, you re indeed too valuable to die now, after all you are the first to survive with more than one part of his body intact and other parts still usable."
The woman placed a ring on the man's finger before leaving for a moment.
Upon realising he was alone, a defeated expression appeared on the man's face. he didn't want to give the woman any satisfaction by giving up, however the pain was already unbearable and while he was still relatively sane, he could feel every cell of his body and every corner of his mind beg him to just embrace death. He knew he might not be able to continue sane if he was burned alive once more, perhaps this time he would finally let his consciousness vanish and stop struggling, however for now he refused to do that.
"It will be okey, baby girl." he said, thinking about his daughter. "Daddy will get out of here and come find you... wherever you are, I promise I will find you..."
"You talking about your daughter?" asked the woman as she returned. "That's right, a small girl was brought here in this batch." she continued while placing a finger of her chin. "I don't usually pay much attention to those things, but my son for some reason doesn't experiment on children so whenever someone brings me a child I kind of remember it."
Her words got a reaction out of the man, who focused on her silhouette with despair and rage evident in is eyes. "What did you do to her?!" he screamed while thrashing around, still chained down and unable to escape.
"Well, she is in one of the cages." replied the woman, shrugging her shoulders and lifting a tank of oil on top of the man, pouring some of its contents on him. "I was going to use her to feed my nemean lion but since you said that she is your daughter then I will experiment on her carefully, maybe what makes you so compatible with fire and the seven other hearts in your body is within your dna."
The man stared at her silhouette with a broken expression. "W-What?" he muttered in disbelief.
"Ah you are curious about the nemean lion? Well it's not the real nemean lion, its just a lion with bullet proof skin, however it is still quite amazing. I made it as a birthday gift once my son turned 18 since it has golden hair and red eyes like him." explain the woman, her expression changing into a proud one for a second before becoming stoic once again.
"Don't you dare touch her!" screamed the man.
"I don't understand why you are angry though." said the woman, lighting a match on fire. "If your daughter was amazing like my son I would understand your reluctance to see her die, however why would a failure like her matter?" asked the woman confused before shaking her head. "Whatever, I have never been interested in the opinions of test subjects so you don't have to answer. The only reason why I am even talking to you is because my son said that I have the 'social skills of an Uchiha'. I don't know what that means but it didn't sound like I compliment, so naturally I am trying to improve. I read that saying what you are thinking is the first step in holding a 'proper' conversation so you get the point."
As the woman finished talking, she threw the match at the man who was now bathed in oil and watched him burn. His screams filled the room as countless curses were thrown at her, however her expression remained unfazed as she kept looking into the bright flame, occasionally moving her eyes away to write down what she was seeing.
After nearly an hour of burning, which required from the woman to add more oil several times, the man finally passed away. She quickly put the fire out before he came back to life so as to not waste his new life by the same fire.
What came back from the fire was the same man, however his expression was different. Unrestrained rage flowed from his eyes as he focused on the woman. "I will kill you." he said, memorising every feature she had.
"Extremely unlikely." she replied before getting closer to him, a saw on her hand as she got ready to tear the man apart and study what was different about him. "Now shut up, I have already talked way more than I am used to and want some silence... or some screaming I suppose."