If there is a story out there that is similar to this one, I apologize in advance. I am not copying anyone. It really is an interesting idea.
Disclaimer: I don't own Harry Potter or Death Note. It would be awesome but it's impossible.
The night was dark and the only sounds heard were the murmuring of three people outside of a very normal looking house. These people however were the exact opposite since they wore robes and one of them was giant and hairy. Yes, these were Albus Dumbledore, Minerva McGonagall, and Rubeus Hagrid. They were setting down a bundle of blankets on the doorstep of the normal looking house, or, as we know, the Dursley's house. Hagrid left and McGonagall and Dumbledore looked solemnly at the baby. Dumbledore wished the baby luck and left while McGonagall just stared at the baby.
She couldn't leave the boy here. What was Dumbledore thinking? These were the worst types of muggles there were. Didn't Lily often tell her that her sister Petunia hated magic? Why would Dumbledore send a child to an environment like that? Well she would not stand for it. McGonagall picked up the bundle of blankets and spelled the letter to only show that parts that Lily had died. As McGonagall turned to leave she noticed there were several charms on the baby. The first was a tracking charm which she easily relocated to the couch in the Dursley's house. The second one was a block on the baby's magic. She could not identify the third but knew someone who would be able to recognize it as well as remove the block on the magic. It was not in her power to do so.
"Come on little Harry, let's go see a friend of mine," she said softly to the sleeping boy. Harry smiled slightly. McGonagall turned and with a sharp crack, disaperated to a big building with a large garden. Everything was dark as she walked up the path to the front door so she pulled out her wand and said, "lumos." She was able to locate the doorbell and pressed it. After a few minutes of waiting the door opened and a man stepped out.
"Why hello Minerva, what can I do for you?"
"I have a child with me right now. Dumbledore was going to put him with his relatives but I brought him here once he left."
"Why did you bring him here? If he has living relatives surely he would be better off there. None of the less please come inside. It is rather chilly outside."
"Thanks you Quillish." McGonagall stepped inside and was led to a sitting room area. She sat down on a large couch and waited for her friend to close the door. He came in and sat down on a chair across from her.
"Please explain."
"This baby is Harry Potter. He is magical like some of the other orphans here," McGonagall explained everything about the death of Voldemort and why Harry Potter was sent to his relatives. She also explained that his relatives hate magic. Now Quillish knew about the existence of magic and the wizard world but he himself was a muggle. Several of the children in his orphanage turned out to be magical so he was accustomed to McGonagall showing up to explain magic to them. After several years of this routine, he learned many things about the wizard world and they became friends.
"I see, so you would like one of the graduated Hogwarts students that work here to identify and remove the charms on this boy."
"Yes, as soon as possible as well. Blocks on magic can become permanent if left too king. We are lucky this one was put on him fairly recent."
"Yes, I see. Please hold on a moment." Quillish walked off to a staircase and soon all that could be heard was the sound of footsteps. McGonagall was left to her thoughts while Quillish went to go get perhaps one of the most powerful student she had ever had the pleasure of teaching. It was strange though, he had always hid his power from everyone except for her. She never questioned it though and just accepted whatever the bright Ravenclaw did. The sound of voices could soon be heard and two people walked into the room. The new man walked over and smiled.
"Why hello Professor, Mr. Wammy has informed me of the situation. Would you like me to remove the blocks now?"
"Yes John, that would be best."
"Okay." John waved his wand over Harry and frowned. "He has a block on his magic, and a black on his mental abilities."
"Please explain the mental abilities," McGonagall asked softly.
"It is a very rare block that makes it impossible to learn Occlumency, Legilimency, and other natural talents like photographic and eidetic, and photographic memory. This block seems particularly powerful and I believe it is even limiting this boy's IQ so that he does not do as well in school. With this block, he would be a very average student."
"Are you able to remove the block?"
"Of course, it should be easy Dumbledore is getting weak in his old age. Just give me a sec."
"Hold on, Dumbledore?" McGonagall exclaimed.
"Yes, his magic signature is all over this boy But why would he put these spells on such a young child?"
"Yes that is a question I would love to ask him," McGonagall seethed. She passed the baby over to John and let him work on each block. His eyes were closed in concentration and his lips were moving slightly as he muttered the spell to undo the blocks. Soon some intense magic filled the room and the baby woke up. John looked around startled then conjured a bracelet of black string and put a spell on it. He placed it on Harry's wrist and explained what it was.
"This baby's magic was extremely powerful so in order for the baby to get used to it, I put a magic restrictor on him. I will take it off, when he learns some control techniques so it might not be for another few years. Wait, look at his face. It's changing." Harry had opened his eyes and they had become darker until they were a very dark green. His face became very pale. McGonagall jumped up I anger and a bookshelf next to her began to shake.
"Why would Dumbledore lock his powers like that," she hissed. "It seems he is a metamorphmagus and that Dumbledore made him change his looks and froze him like that. I have to go set things straight with him." John stood up and put a hand on her shoulder.
"Professor, please sit down." McGonagall obliged. "I have known this for years but I have not told anyone yet. Dumbledore is obsessed with power. He cannot stand being second best. This is why I hid my true power from him. I also did some research a year ago and found a prophecy that was about the downfall of Voldemort." McGonagall shuddered. "I believe Dumbledore is going to make Harry the child in the prophecy you can defeat Voldemort. The changes in appearance could be to make the child look more like a hero because, no offense to the child, I do not imagine a hero looking like he does now."
"Well then why would he block his other magic and mental abilities?" McGonagall asked.
"My best guess would be because he was afraid of Harry becoming more powerful than him. Dumbledore always wants to be the big hero but if Harry becomes more powerful than him, Harry would most likely become one of the most influential people in the world. I hid my power from Dumbledore so that he would not suspect me and manipulate me into doing something I didn't want to do." At that, John waved his wand over Harry and a paper appeared. "Well, I can now guess why Dumbledore blocked his mental abilities. This boy could be a natural occlumens after a little training. He also has an eidetic memory and, even at this age, has a very high IQ. This boy is a genius in the making."
"Amazing," McGonagall breathed. "He should fit in well here then."
"Oh yes," Quillish said. "We will be able to teach everything he needs to know."
"I will tutor him in magic when I remove his magic restrictor," John said. "For now I think we should give this boy a new name. He will be recognized too much with his old name. Quillish, since you will basically be raising the boy, why don't you name him?"
"Yes, let's see. I think the name L Lawliet should do nicely."
"Yes," McGonagall said. "That does somehow suit him. I must be going now. Dumbledore is most likely wondering where I am."
"Yes, please don't tell him anything about where Harry, or as I should call him now, L is."
"Don't worry, I know Occlumency. Well so long." McGonagall walked away and as she left the orphanage she whispered, "Good luck, L Lawliet."