Training and change

                                    

                                          
Previously 
"That is easy first I want him to be healthy and strong again and second I want him to experience what a family truly is," said Dante as Trish smiled "You won't be alone on this I always wanted a cousin," said Nero as Dante looked at the three of them and smiled. "Alright let's get started," said Dante as he got up from the chair.
Now
Months have passed since that faithful day izuku's condition got better he also found out what it means to have a real family he started to call Lady mom, Dante's dad, Trish aunt, and Nero his cousin. Izuku also found out what his parents do for a living and asked them to train him. They hesitated at first but saw the determination in his eyes.
Lady taught izuku how to use firearms. She was impressed by how fast izuku could handle every weapon she threw at him. She then decided to let him use her weapon Kalina-Ann although he couldn't use it as well as she was proud of him nonetheless.
Trish taught izuku a bit of magic and he only used the basics. Izuku not having a quirk made it easier for him to gather mana inside his body. Izuku then thought of something as he got two pistols he closed his eyes and concentrated on an element when he opened his eyes he saw he imbued the pistols with magic when he showed what he could do to Trish she was surprised and congratulated him.
Dante was teaching izuku swordsmanship and he was not going easy on him luckily they were using wooden swords. By far the sword felt more natural to izuku. Dante also taught him how to taunt his enemies so it was easier to take them down.
As for Nero, he was teaching izuku how to fight with his bare hands if he was ever in a situation where he was unable to use his weapons. Nero also introduced izuku to Nico who made weapons from swords to guns izuku then asked Nico if he could make his custom sword which she agreed to make for him for free. 
"Hey how come you didn't give me a free item when we met," asked Nero "That's easy it's because he is the son of Dante and Lady," said Nico. They then left and went back to Dante's house where Trish, lady, and Dante were eating pizza.
"So how did it go," asked lady "It went well Nico said it would take about three months to complete," said izuku who grabbed a slice of pizza and sat down on the sofa. "Hey, Aunt Trish is there a way to change my DNA," asked izuku as the four of them stopped eating and looked at him "I can but why," asked Trish.
"Well it's because I have been thinking a lot about this, I don't want any blood ties to my former life I want to share the same blood with my true mom and dad," said izuku as lady and Dante smiled at him "alright then let's begin the ritual shall we," said Trish as she got up and grabbed a golden cup.
"Well let's head outside shall we," said Trish as they all went outside "Okay for this ritual to work both Dante and lady need to put some of their blood in the cup," said Trish as they got a dagger and their hand as blood soon started to pour into the cup.
"Now then izuku this is the part you might not like you must ingest all of the blood for you to become their child and the change will be painful," said Trish as she passed the cup to izuku who looked at the cup before taking a deep breath. He then slowly started to drink all of the blood from the cup as Trish then started to chant some words a magic circle soon appeared underneath izuku.
Soon izuku started to feel the pain he never experienced before "AH" yelled izuku as he felt every cell in his body change after what seemed like forever the ritual was over and Lady and Dante went towards izuku to see if he was alright.
"Are you alright izuku?" asked lady as she got izuku up and on his feet. "Yeah in fact I feel better than ever," said izuku as he felt strong and faster. That is when Dante decided to test something he got a boulder and through it, izuku saw it coming last minute before punching and shattering it to pieces. Izuku then looked at his fist and didn't feel a thing "Dante what fuck was it about" yelled lady as she went to Dante "Hey I was just curious if he was the same as Nero" said Dante with his hands up.
"Wait so what we're you going to do if it did hit" asked izuku "So Trish izuku is a Sparda now," asked Dante "Don't you fucking change the subject" yelled izuku "Yes it seems the ritual was a success he is not only gotten stronger but faster as well other things, he also has the Sparda healing factor," said Trish "the what," asked izuku.
"Here let me show you," said lady as she got a gun and shot Dante in the head "Mom what the fuck" said izuku "Wait for it," said lady as Dante got back up which shocked izuku "Ouch was that necessary," said Dante has he got the bullet out of his skull. "As you can see the healing factor basically makes it harder for you to die but you will still feel pain," said Trish.
"Cool anything else," said izuku pretty calm "Yeah you also have a trigger," said Dante "What's that," asked izuku "It's a special power possessed by demons and hybrids which allows them to release their inner supernatural potential," said Trish. "As awesome as that sounds I am just glad that I no longer have any ties to those bastards," said izuku as they all went back inside the house.