Chapter 1

Founder Ymir sighed as another world was destroy due to her actions through Eren. No matter what, the ending was almost always the same, sometimes worst with the totally extinction of humanity. She turned to a new world and stopped. The new alternate world was different because there was no Eren being born. She had seen this before, it never turned out right, even when there was no Eren.

She started to turn away but then noticed something. There was a single path connected to the new world leading away from it. She followed the path to a black hole. She had heard of these. They lead to completely different universes where there was no her or titans.

Had some of her subjects somehow manage to appear in the other universe? She stepped through the hole, and as she did, her mind was filled with information about this universe.

As she continued to follow the path, she went through the new information. This world had multiple countries, with a secret magical world. There was a war between magicals, mainly against a man that calls himself Lord Voldemort.

Finally, after sorting through the new information, she reached the end of the path. Only to find a 1-year-old child abandoned in the middle of a forest. She touched the child's head where the path was connected.

Her heart broke at what she saw. This child, by the name of Harry Potter, had once had a family, a mother, a father and a twin. Until while the parents were out that Voldemort guy came and killed their babysitter and tried to killed the twins.

She watched as Voldemort shot the killing curse at the twins, only for Harry to let out a scream that was powered by his magic core, that destroyed Voldemort's body, making him nothing more than a spirit that fled. However, because the scream used up so much of Harry's magic, when he was checked over by a man called Dumbledore, he was announced as a squib while his brother was declared the one who destroyed Voldemort's body

Founder Ymir watched as Harry's parents immediately decided to dump Harry on a relatives' doorstep and didn't look back. The relatives then abandoned the boy in the forest, because they hated anything to do with magic. And now here she was

She looked sadly down at the abandoned child. But why had the path led her here? When Harry opened his eyes, she stared into his green eyes that show intelligence beyond his age. That scream he had made against Voldemort had been familiar and now she realised why. This boy was one of her subjects and a future titan.

She picked him up and held him gently like she used to with her daughters. "Hello," She greeted, causing Harry to coo in answer. "Hello, my little Attack Titan"

She then sent some of the knowledge of this world and this boy through the paths to the current Attack Titan holder. She carried Harry back to her universe. She placed the child on the doorstep of the Jaegers, knowing he would be well taken care, despite those future hardships he will face. 'And hopefully his magic core will help him control his titan powers better than in the past,' Ymir thought as she watched as Grisha and Carla rename the boy Eren. 'Not to mention, the paths have shown a better ending for him'

Over the years, Founder Ymir watched as Eren grew, the breach, Eren becoming the new Attack Titan and wanting to join the scouts. She was amazed by the changes.

Unlike previous Erens, this Eren remembered his new abilities and how he became a titan shifter. And because of his magic core, he was able to access all past memories of both the Attack Titan and the Coordinate Titan, along with a few future memories and even some memories from alternate Erens. He also gained some knowledge and memories of his birth world

With all these memories, Founder Ymir watched as Eren, after a year in the cadets, managed to gather his friends, Levi's Squad, the Hange's Squad, Erwin, Pixis and Zackley in a clearing where he proceeded to explain his memories and his titan powers. After demonstrating his transformation and control of it, the leaders, scouts, and future scouts began to plan.

Some events, they kept mostly the same, but with less causalities. Most of the Levi squad was sadly killed during the 57th expedition, but they managed to save Petra. Bertholdt and Reiner's reveal was kept the same, but since the human Ymir was there when Eren revealed his memories, she had pledged her loyalty to Historia, so she escaped with Eren instead of the other two.

As for Historia, after revealing her true heritage, she decided to let Eren keep the Founding Titan, seeing how he was using its memories better than her and he was immune to the First King's will. However, after discussing it, she agreed to become the new Female Titan, after letting the battle of Stohess play out but with less causalities and Eren having full control over his berserker mode.

While the Walls' government was trying to gain custody of Eren and Historia, to keep the secrets of titans, well, secret, Eren and Historia trained with Ymir to perfect their teamwork as both humans and titans. During the training Eren and Historia became closer before they finally decided to go out with each other.

While at first, Ymir was not happy with their relationship, she soon realised what she thought was love for Historia, it was more of an obsession. She then turned her attention Mikasa and found true love with her. They both agreed to become bodyguards for Eren and Historia, especially after defeating Historia's father at Orvud and Historia was crowned Queen. They had a feeling that Eren and Historia's relationship would last, so it was possible Eren could become King beside Historia.

While all this was happening, Founder Ymir had been keeping an eye on Eren's birth world. She knew with Eren looking different to his twin, Voldemort would probably know who the real 'Boy-Who-Lived' was. Over the years, it had been quiet, but now with the twin entering their fifth year, and it had been decided to bring back the tri-wizard tournament. She investigated the path and saw that Eren's birth name would be entered along with his twin.

She used the path to communicate with the goblet of fire, so when his name was called, certain people and equipment would be brought along with Eren, so he wasn't alone. While they were in the other world Founder Ymir would pause time in her universe, so when they were done with the tournament, they could get back to reclaiming Wall Maria. 'This should be interesting,' she thought as she began getting everything ready for her subjects