My cosmic friend

The Levi Squad looked at the new arrival. He was definitely not human, they could tell that much due to the massive wings sprouting from his back. They were also amazed at how nimbly he flew through the air.

"Why are you here?" Asked Eld Jinn.

"Tell us or we'll clip your wings and leave you for titan food." Thundered Oluo.

"First of all tell the lapdog to shut the fuck up…As for who I am, call be an acquaintance of a new recruit who stumbled upon something much bigger than she thought. She has an entity of considerable power and of good looks…moi…at her disposal in all for the want of a body." The stranger replied.

"But you have a body…" Pointed out Petra. The stranger floated as Petra came at him.

"Punch or stab me if you want." The punch connected but then the body faded away leaving the feeling of cold air.

"Just a spirit…Now as for why I am here…My guts are telling me you're all in terrible danger…WATCH OUT!" The strangers intervention just about saved Gunther's life as a figure zipped through the trees blades slashing into thin air.

"Who was that! What was that! How did you know!" Garbled the Levi Squad.

"I have the site of a hunting bird. Basically I can, blondie drop now. Confringo!" Eld Jinn dropped as the stranger launched a red light, the attacked dodged and the tree they had come from exploded like it had been struck by a cannon.

"How the…"

"Same way Yeager can Titanshift…Don't give me that look. It's obvious. New recruit with some decent looking guys, gorgeous woman and their pet guard dog in the middle of a conflict with Titans. Presents me with two options 1) New guy is born to fly and fight or 2) possesses a skill that evens up the battlefield…Now gorgeous go vertical…NOW! Guard dog dorp NOW!"

Ral launched herself vertically and Oluo dropped. The woman was quick her blade extended and her hand came free. "I'm Harry by the way. Harry Potter…Now we better…Fuck it. I'm going to change by mass and all of you get on and for fucks sake do not flip out."

The newly introduced Harry, began to change. There was no clap of orange energy but it was visible, his legs became trunk like and then covered in scales, his feet suddenly erupted into claws and his body lengthened, thickened and soon enough a massive reptile appeared in the forest "What are you waiting for, get on!"

Harry's current state was that of a magical construct. Meaning he was powered on belief and orders. Krista's orders were for him to do whatever it took to save the people his senses at him were screaming to be saved, would help power him further. Soon enough he felt it, the blast of energy and soon enough they were being pursued by the Female Titan.

"Can you go faster?" Shouted the woman, Harry grunted and soon enough they were soaring above the forest. Harry looked down to see that the female titan had been left behind. It was either left behind or she lying in wait. He looked ahead to see myriad of smoke signals.

"If you can herald this lot when we come in to land, I'll be able to bugger off. Yeager, Krista is going to need to talk to you soon."

The Scout Regiment yelped as a gigantic creature descended from the sky, blades were drawn. The thing ascended and descended again and one by one members of the Levi Squad landed on their horses, Petra more elegantly than the rest.

Erwin looked at Harry, who was now slowly drifting over to Krista. He followed suit as did Levi "Step away from the recruit." Stated Erwin calmly.

"I would if I could. Who are you?" Harry asked. The same questions were mimicked by Levi and Erwin.

"Harry, behave. No Harry, I have made my bargain with you and in both of the names you know me by I order you to behave." Snapped Christa.

Harry snapped to attention "Your will be done."

That caught the veteran scouts off guard "Who are you?"

"Harry Potter, a disembodied fighter from either a time long gone or a different world it has been too damn long to actually recall. I have…a…unique set of skills. One of which you saw."

"The Lizard thing." Erwin said.

"A Dragon to be precise…That is but one of my gifts."

Erwin nodded "Can you do that on command?"

Harry shrugged and nodded "Yes and No. Yes I can do it on command but at this point in time, shifting into my dragon form as more or less left me completely devoid of free movement."

"How do you get your body?"

If it wasn't for Krista's order Harry would have had a little bit of fun. "Pair of clothes about your size, chalk, a tub, boiling hot water, a stone, blood, flesh, muscle, bone and brain and a really complex and simple incantation and a full moon."

"Have you got this stuff prepped?"

"Again yes and no. Incantation and performer, willing people to donate the organic parts but not to the rest. We were planning to do it at midnight without your permission."

Erwin snorted "I give you my permission."

Harry grinned "Krista anything else?"

Krista shook her head "You are dis…"

Levi spoke "Aside from being another pair of boots can you provide anything else?"

Harry smirked and it was a smirk that Levi had seen before on the commander of the Military Police but instead of that one being pure arrogance. This one was of cold certainty of being able to deliver on his promises.

"Once I get my body back, you will be amazed."

That night the full moon blazed. Krista got to work, she made the textbook ritual circle, set the tub of water inside the circle and almost immediately it began to boil and bubble. With that Krista grabbed Eren's hand "A Hand of flesh, muscle and bone from a warrior, freely given shall craft your broken shell a new, blood of the determined warrior and champion of humanity shall provide a lineage to honour and fight for. Finally brain of the scholar to guide the mighty fury and power drafted into your frame." As she spoke, Eren's hand which had been severed and stripped apart fell into the tub. Fortunately she had executed the incantations correctly and it was now glowing a bright emerald green.

"Finally the heart stone. The stone containing your soul and power. May it bond and give rise to you my champion, guardian and friend." She dropped the stone in.

The green pool turned blood red, then jet black and then clouded over.

Suddenly it began to froth and bubble "Blood, flesh, bone, muscle and brain the five part of humanity give your champion life. Blood, flesh, bone, muscle and brain the five part of humanity give your champion life, make him feel again. Blood, flesh, bone, muscle and brain the five part of humanity give your champion life, make him breath again. Blood, flesh, bone, muscle and brain the five part of humanity give your champion life, make him fight and love again. I, Krista Lenz also known as Historia Reiss call Hadrian James Potter back from the abyss. I, Krista Lenz also known as Historia Reiss call Hadrian James Potter back from the abyss, so he may fight and save humanity again."

The tub began to glow and incandescent red as the power of the ritual surged through it. Suddenly steam billowed out of it and there was a colossal bang "DO NOT ENTER THE CIRCLE!" Snapped Krista.

The cloud began to dissipate and kneeling in the circle bone naked in the mist was none other than Harry Potter. Harry stood up, looked himself over and grinned "I'm alive again. I'm feeling more alive than I ever have been before in a while."