Usual disclaimers all characters' from the original books do not belong to me.

Educating Sirius

Sirius grunted pushing his magic into the ball of fire he held in his right hand, as it grew he stretched it out in to a staff using his left hand. Panting and dripping with sweat he looked over to Hagrid who nodded approvingly, Sirius switched his grip on the column of twisting fire and threw it at the training dummy. When the fire impacted it completely incinerated the dummy, when he saw that he had done it Sirius collapsed to his knees exhausted.

Hagrid watched as Sirius dropped to his knees very proud of the progress he has made in the last few months, once he got his mind around his ability to use wandless magic he had progressed very rapidly. "Very good Sirius, you're getting the hang of using the elements" Hagrid stated as he walked over and helped Sirius to his feet "Some more practise with fire then we can move on to shadow"

Sirius smiled up at him "time for sword practise then?" he asked, Hagrid merely waved his hand and the training dummies leapt into action. Sirius summoned his sword to his hand and backed away from the nearest dummy to create some separation and room to manoeuvre. Settling on his plan of action Sirius dashed at the closest dummy, dodging its sword that was moving faster than most people could see, Sirius twisting around he cut the dummy in half.

He twisted just in time to parry a huge blow from the next dummy as the third charged his blindside, fortunately his enhanced hearing made up for that. He dropped to his knee as the dummy raised its sword and flipped it over him in to the second dummy and drove his sword through the pair. Channelling his magic through his arms and legs he charged the remaining three dummies and decapitated them faster than they could react. The six dummies defeated he bent over and rested his hands on his knees panting.

Hagrid was impressed Sirius's ability to enhance himself using magic, it was something he seemed to have a great natural affinity for "Sirius, go and spend some time with Harry we will have your lessons tonight instead of now" Sirius merely nodded his head and walked back into the castle. Hagrid merely chuckled and wondered off into the forest.

Pushing open the door to the tower Sirius wasn't surprised to see the contents of the room floating around, the normal accidental magic associated with children had always been strong but coming here had amplified it even more. What did surprise Sirius was that Harry was also floating around the room with his toys, instead of panicking Sirius calmly strolled over to where Harry was currently floating upside down and plucked him out of the air. Looking at Harry, Sirius realised that his little emerald eyes were glowing "odd" he thought "I'll have to ask Hagrid about that".

Settling himself into his favourite armchair he made sure Harry was comfortable on his lap before he lifted the book on wards that he was reading, before long Harry had fallen asleep and Sirius nodded off not long after him.

Hagrid had a problem, Harry had a tiny piece of Voldemorts soul in the scar on his forehead, he had known of course that Tom had been creating horcruxes but just how unstable was he that a part had fractured unintentionally. He didn't know what effect it could have on Harry either, could it influence him? Or would Harry's soul and magic consume the piece? He needed to remove the soul piece from him that much was sure, "Farax?" he asked "What do you think of the soul piece inside of Harry?"

The phoenix looked at him for a moment before he replied "I don't think you need to worry about it Rubeus, Harry is already consuming it slowly. He is very powerful I can feel him from across the school and he is only one and a half, between being naturally powerful and that being amplified by being here his magic is slowly absorbing Riddle's fragment"

Hagrid was shocked he took a moment to concentrate on Harry and to his amazement Farax was right "How will absorbing the soul piece affect him?" he asked

Farax answered calmly "I don't think it will overly affect him, if it has any effect the boy may be slightly darker but given that you are raising him I don't think that's much of an issue" once he was done speaking Farax flew out the window to go hunting.

Hagrid sighed, so he didn't have to worry about the soul fragment contained within Harry because Harry was dealing with it himself "Incredible" he thought "That boy is going to be a force to be reckoned with by time he was of Hogwarts age". Hagrid sat down at his desk to begin preparing for Sirius's lesson.

Hagrid was just admiring the grounds surrounding the castle when he heard a knock at his door, he smiled no matter how many times he told Sirius to just walk in he would always knock. In his mind, it was still the headmaster's office and that would probably take a while to change "come in" he yelled. Sirius opened the door and walked in, carrying Harry on his hip.

He walked across the room and handed Harry to the fire Gollum that had grown to be Harry's favourite during these lessons. The first-time Harry had crawled over to the Gollum both Hagrid and Sirius had both panicked, yet when the Gollum picked him up they were both shocked to find that it didn't burn Harry at all.

"I'm still not used to that" stated Sirius as he sat down at the desk.

"I know, his ability with fire is going to be immense if that's what his natural affinity is like now" Hagrid replied as he took the immense seat facing Sirius.

"Today we are going to be talking about magical cores and magical development, first off what do you know about magical cores?" Hagrid asked.

"All I know about them is that some have larger ones than others and that they are what give us our magical abilities. But I know there are other aspects to it like peoples' affinities and their magical control" Sirius replied.

Hagrid nodded in agreement "Very good, you know more than I expected. We will start with just the core, firstly you're correct in saying that they come in a variety of sizes basically this is how much magical energy you can expend. The size of your core can be increased over time if you train it, think of it like a muscle it can be trained like muggle bodybuilders train their bodies. Next we move onto what the core contains and produces, your magic. This is where we need to get into potency or some people call it density, effectively this is how much of your magic you need to use to perform a spell. So, if your magic is more potent than mine less of it will be used in a spell but if you were to put the same amount of magic into it as me then the spell would be more powerful." Hagrid paused at this point to allow Sirius to ask any questions.

After a minute Sirius spoke up "Is there any way improve your magical potency?"

Hagrid replied "Not really, there are few ways but not any that are readily available for you. Generally, it is what you are born with however if you use it enough between your magical majorities it can increase then. Another way is if you absorb some other form of magic or receive some form of blessing from a magical beast and that is unbelievably rare trust me."

Sirius looked intrigued at this so Hagrid gave him a moment to gather his thoughts before he asked his question. "okay I think I'm following you for the most part, everyone can store so much energy and each person will have a different potency which effects how much magic it requires for them to cast a spell, but what are magical majorities?" he asked.

"Well magical majorities are important points of development in a person's magical abilities, majorities usually occur at someone's 11th, 15th, 17th and 21st birthday or near to those dates. Usually for most people the size of their core just increases in size, however if said person has trained a lot or their control over their magic is good enough sometimes the potency can increase but this generally isn't a great amount. your majorities usually help to increase your control over your magic as well which is why you can cast more complex spell more easily as you get older. Your first majority at 11 is why you start your formal magical education at that age, however children can use magic before this age as you've seen" Hagrid answered as the Gollum bought Harry over to him.

"After the capacity of your core and the potency of your magic, you then come to your affinities. Most of wizarding kind that know anything about cores don't realise that people have two kinds of affinity, firstly you have area's where you have a lot of potential for example battle magic, some people even are more specific about offensive or defensive types these are the affinities that wizards remember. The next category is a person's elemental affinity so fire, earth etc. however this extends to lightning and a few other obscure ones, while most people are born with only one affinity it isn't uncommon to find those aligned with two or even three elements, there are however some rare magical beings aligned to four or more. We know for example Harry definitely has a strong affinity for fire." Hagrid states as he summons small jolts of electricity dancing between his fingers to demonstrate.

"What you need to remember is that a natural affinity for something does not automatically make you a master it is something you still need to work on it, you will just improve much faster than you would otherwise. Likewise, not having an affinity for something does not prevent you studying it and working hard to master it anyway. However, I think I have dropped enough on you for today" Hagrid finished as he banished the electricity from between his fingers.

Sirius looked up from the notebook he had been scribbling furiously into and sighed, debating whether he should tell Hagrid that Harry had been floating when he walked into the room. Steeling himself he started talking "Hagrid, when I walked back into the tower after our combat training earlier Harry was floating through the air along with his toys and his eyes were glowing the same colour as the killing curse."

Hagrid was shocked to say the least an infant powerful enough for their eyes to glow let alone defy gravity. He sighed "tonight could be a long night" he muttered under his breath, "There is something I need to tell you about Harry's scar Sirius, you'd better get comfortable".

So I hope you guys enjoyed this chapter from this point there will probably be time skips showing various stages of Harrys childhood.