Disclaimer : I don't own harry potter or Stargate

'think'

"talk"

Harry was ready to flee in another country when he disappeared in a white flash. When he was able to see again, he saw a man before him.

"Hello Harry, I have a proposition for you."

"What? Who are you? Where are we? How did I get there?"

Harry was confused and a little scared. He was searching for his guns discretely but he couldn't find any of them, even his invisible and shrunken trunk disappeared. He also couldn't find his wand or feel his magic. He was completely powerless.

Janus was still smiling and waited for Harry to calm down before he answered his questions.

When Harry finally stopped asking questions, Janus decided to answer Harry's questions.

"My name is Janus and we're in my ship. We're in orbit around the moon. I transported you here with my teleporter?"

"WHAT? but that's impossible, there isn't any technology like that on earth, the best space ships earth has is the small ships and there isn't any teleporter that works on earth; it's sci-fi."

"I never said that I was from earth and-"

"You're an alien? But you look so human."

"I can't answer you if you always interrupt me!"

We could tell that Janus was beginning to be annoyed so Harry decided to shut up and listen to Janus.

"Sorry"

"I may look human but I'm not, I'm an alteran, We are much more advanced that humans."

"Ok, what do you want with me, why did you bring me here? and where are my things?"

"I'll give you back your things later, now I'm going to tell you but first you need a small history lesson."

A table and two chairs appeared in a white flash.

"Sit down."

When Harry sat on a chair and was ready to listen, Janus started talking:

"Millions of years ago, there was one race, we were trying to do ascension ,that's leaving your body and becoming pure energy. Over time , our society divided into two parts: the ori that believed that the ascended should use their power to rule everybody and the alterans that believed that the ascended shouldn't use their power. The alterans were forced to leave their galaxy and they arrived into another galaxy they called Avalon. This galaxy was the milky way. The alterans built a huge empire based on a new technology, the Astria Porta : the Stargate. It permits to travel between two stargates on different planets instantly. Then there was a plague that killed a lot of alterans and we were forced to flee again to another galaxy, the pegasus galaxy. Once their, we again created humans but there was an accident, we created a new race: the Wraith. The absord the life force of other beings, killing them. The alterans and the wraith were at war and we had much better technology so at first, we were winning, but one day, a lot of new wraith ships appeared, when we destroyed one, another appeared and when I fled, the wraith were already on near atlantis , our last city. The high council was talking about abandoning and fleeing to earth but I didn't want to abandon and I was dying so I made a clone of myself that would stay with the others and flee with them or ascend while I would use the little time I had to find a way to repair the errors of my race. I used a ship with and I took it to another reality, this one but your planet is the only one that has life on it. That was 10 000 years ago."

"That's incredible, but you said you were dying, how did you survived 10 000 years?"

"I was in stasis but even with stasis, I would have aged and I only had three months But I knew time slow down when you're close to the speed of light so I sent my ship in a circle at 0,999 of the speed of light"

"that's nice but why did you take me here and told me this?"

"I will soon die and I hoped you would take my place and repair the mistakes my race made."

"Why should I do this and why me?"

"I choose you because you are one of the few that is developed enough to handle the knowledge of the alterans. You are the only one of them that showed that you wouldn't abuse you power or technology, you were brave and finally, you were smart. You are the best choice of every human."

"Thanks, but you didn't told me why I should help you, even if it seems like a good thing to do."

"If you help me, you will have extremely advanced technology, you will be free of the others wizards , you won't have to flee, you will be able to explore another dimension and you will be able to meet others races. You will have a way to live longer and finally, you will save a lot of lives."

"It's very tempting but I think I need more information and a little time to think."

"I can't give you more than a day but I will let you use my database."

The next morning

"OK I will help you"

"Good, Take your things and follow me"

Harry followed Janus to a small room with a strange machine in the centre and a hole in a a wall

"the machine in the centre in a DNA re-sequencer, with this, I will give you the gene used to use our technology, the other machine in the wall will download all the knowledge of the alterans in your head. We have to be quick because I just have two months to live. Go to the re sequencer."

Janus used the re sequencer to give the ATA gene and then Harry put his head in the repository before fainting.

The next day, Harry woke up with a lot of new knowledge in a room he never seen before.

He got out of the room and knew he was not in the ship, he already knew where he was in the base because he had the plan downloaded in his brain. He went in the lab an found Janus working on something.

"So what do we do now?"

"OH, you're awake already, that's good, we should start to prepare for your travel, but first, we have to build a ship."

"we need to know the enemies in the milky way and pegasus, do you think we can install your reality drive on probes and send them to the other reality ?"

"Yes, that's a really good idea, the constructors will build a few probes and we will send them to my reality. Now we need to build a new ship."

"Do you think we need to use an old design or make a totally new one?"

"We need to make a new ship, we don't know the strength of the enemies ships so we need to make the strongest ship possible."

"The alterans only used drones and small plasma cannons on their ships so we must make new weapons"

"So what do you propose?"

"Do you think we can modify the drones so they send an EMP when they touch the enemy ship to act on their computers"

"this may be possible but the most advanced races will have protection against that"

"We could at least use these drones against weak enemies to stop them without killing them. I've got another ideas, I saw my cousin play a video game called halo and they had weapons called MAC and a weapon called energy projector. Do you think we can create something like that?"

"Let me see, the MAC could be useful and the energy projector seems like a very good weapon, these suits of armour looks good too, we could try to build them. The MAC is easy to build and we could create energy projectors by modifying the weapons of defence satellites to fire a much bigger ray and use plasma. The armour will be a little harder but the constructors should be able to build one in a month if the computer program is good enough to create something like this if it is 's very good harry"

"Good, now we have the weapons for our ship with the MAC, drone , big and smaller energy projectors and plasma cannons. We need defence systems now. We should use a shield like the one on Atlantis for our ship, but do you think we could also use a defence grid? "

"What do you mean?"

"we could use weapons to stop missiles , small ships and others things that come close to the ship."

"Yes , we could use plasma cannons to defend the ship."

"We could also use rail guns and lasers to be sure. Maybe we could modify a teleporter to protect us if things come too close to the ship."

"You see, that's why I choose you Harry, you know war, in five minutes, you had so much ideas while the alterans were so used to peace that they only used drones as a weapon."

"Now we need to finish the list of what we need in the ships and then make the plans and build it. I think the ship need a big armour like 1 m of armour. What could we add to the ship?"

"We could put a Stargate in the ship, rings, and add stasis pods in the ship."

"We'll need the best radars in the ship and also a way to hide from the radars; We could also use invisibility on the ship."

"The ship will be very big, we will need teleporters inside the ship to move quickly"

"Janus, do you have a way to protect the inside of the ship?"

"Maybe, the alterans created mini drones so we could use them."

"OK, we'll need cells for prisoners and a few armouries everywhere in the ship. Janus, can you create the plans for the ship while I create small weapons I'll need later."

"Ok Harry let's go"

A week later, Janus and Harry had finished their work and were ready for production of the weapons and building the ship.

The ship will be 7 km long and 800m wide and 300 meters high. Janus had to modify the Arcturus reactor to make it work because the ship needed so much power. Janus used another dimension instead of our own to use in the generator. The ship only needed to use the control chair to work. The phoenix will have three defence grids, drones launchers everywhere on the ship with normals and modified drones. Janus managed to make two MACs at the front of the ships, a big energy projector under the ship and 30 plasma cannons: 7 on each side, seven on the ship, seven under the ship, one on the front and one on the back. The phoenix will have the best hyperdrive they had, he will cross between the galaxies in a day. In the ship, they will have a big room with a Stargate with an iris and a shield and gate ships. The Phoenix will have little space, there will be five labs, a prison, fourteen armouries in the ship and rooms for three hundred people, the mess will be very big and finally, the control room will be in the centre of the ship.

Then Harry showed his new weapons. He created:

-a new gun that could fire bullets or energy that stun, kill or destroy. The gun looked like a 357 magnum with a double barrel: the top one fire bullets and the bottom one fired energy.

-an assault rifle that looked like a FAMAS that fired energy bullets that could stun or kill

-an energy sniper that could fire at 2 km

Harry also created a Mjolnir armour that worked very well and had a very strong shield and an energy sword that looked like a katana.

Harry and Janus ordered the creators to create the Phoenix and enough weapons to fill the armouries.

"Harry, the construction will take five months but I will die in a month and a half so you will have to finish alone."

"Can't you find a way to live longer?"

"No, I already tried and we can't do anything."

"Can't we clone you like you did before?"

"No I don't want to live like that, it's time for me to die."

"But I need you, I'm not ready!

Can't we put a copy of you in the computer of the phoenix to help me, you could die like you want but you could still help me."

"You're right, I'll do that."

"We'll also need allies, I can't fight an entire race alone. But nearly all of my friend betrayed me."

"We can't ask the goblins or the ministry to help, their known to betray their allies and the goblins only care about money."

"What about Nevile, he didn't betray me, he's nice and can be brave?"

"He was my second choice after you so I approve."

Harry and Janus went to the control room and Neville appeared in a white flash.

"What happened? Harry, is that you?"

Harry explained the situation to Neville.

"You're always in trouble! Ok I'll help you, you're my friend and I can't sit there while billions of people are dying."

"Great Neville, follow me."

Harry took Neville to the re sequencer and the repository.

A month and a half later, Janus died and Harry and Neville kept a copy of his consciousness for the phoenix.

A month before the ship was finished, the probes came back and Harry and Neville examined what they found. They learned that the wraith were still alive and that the alterans disappeared. They was lucky because they were hibernating so they had time to prepare to fight them. The probes from the milky may had bad news, nearly the whole galaxy was enslaved to a parasitic race called the goauld but there was few good news: first, earth was still free and they started to use the stargate, second, the goauld had much lower technology than him and finally, the asgards were still here even if they were dying.

During the construction of the Phoenix, Harry and Neville trained with their armour and weapons, but they didn't neglect their magic training. Harry used his invisibility cloak to go to gringotts to take everything from his vaults to his trunk and bought a lot of potion ingredients and books in diagon and knockturn using polyjuice to look like Janus.

The boys trained in battle magic and wards to protect themselves and others but Neville also learned healing magic.

Harry and Neville decided to start by beating the goauld because the were the immediate threat.

Finally, after five months of hard work the phoenix was finally ready and Janus was in the computer. They was ready to go.( The Phoenix was huge and looked like a human cruiser from halo)

Harry and Neville took the phoenix and decided he had to capture a goauld to try to find a weakness and maybe find a way to free the hosts. He searched for a weak goauld and found qetesh. That was the weakest goauld he found, he had little army, only one planet and was really isolated, so they went on the orbit above qetesh's planet before they activated the reality drive.

The Phoenix disappeared in a white flash. He would never be seen in this reality again.

I wont use anything else from halo and I know halo started much later but I wanted the phoenix to have an energy projector and harry to have a mjolnir so I modified the date for halo

Thanks for the reviews and I'll try to update soon

Tell me what you think of this chapter thanks