Been interested on writing this for quite some time now. Especially since the crossover potential is so great. Hope you all enjoy. I very much want to give a shout out to Z-King. They inspired me to write this story and if you haven't already read their Godzilla x Titan fics, JUST DO IT!

Year 0844

The tall trees within the forest shadowed the ground leaving only patches of sunlight to warm the grass and shrubs. Birds made various calls to each other, cicadas moved their wings constantly, and even a few deer sang one or two notes in between bites of grass. Everything was peaceful and like nature intended it to be.

CRASH

Such peace was never meant to last in this world however, as a tree was forcefully knocked over by the rampaging 15 meter Titan that rattled the ground with each step. Of course Titans didn't just stomp around wildly for no reason. They only acted wild when around their source of food: humans. This far into a wooded area the only humans that would have any reason to be there were of course the ones either on horseback or flying between trees using their 3 Dimensional Maneuver Gear.

These men and women were members of the Survey Corps; soldiers dedicated to fighting the Titans outside the Walls of the last known civilization of humanity and also seeking to expand and claim new land for colonization. Many civilians thought them hopeless fools doomed to either fail their task, or die, or both. The other two branches of the military, the Military Police and the Garrison, respected their courage, but like the civilians thought them to be living on borrowed time.

Nevertheless, the current scouting party consisting of 7 soldiers, 4 men and 3 women, had gone several hours without encountering a single Titan, strange as that was, until stumbling across this one. It was tan, with short black hair, one eye shut, and its mouth hanging open like a Big Mouth Bass. Like most Titans it wasn't very intelligent and its coordination was so bad it missed the 3 swinging soldiers by a large margin. They, of course, had no such problem.

One of the two men dodged another clumsy attack easily, but his face was set in a stony glare. Not at the Titan, but at the other male using 3D Gear. "Nick, I think it would be best to stop screwing around and kill this damn thing now. It's more interested in us than those riding the horses, so we've no danger of being stranded out here."

Nick, an unassuming man with glasses and a beret, nodded meekly in return. "Ok Philippe, I was just trying to be cautious is all." Turning to the female soldier shooting from tree to tree, he pointed to her, then to one of the Titans arms. "Hit it fast Audrey, then I can go for the nape!"

Audrey nodded, sweeping a strand of blonde hair away from her eyes as she made her move. With a quick burst from her Gear she went from slightly behind the group to pacing evenly with the Titan. Pulling a blade and gripping it till her gloved knuckles were surely white, Audrey activated her Gear as she turned her hips slightly. The burst sent her flying past the monster and with a swipe of her blade it lost its right arm at the elbow. Of course the Titan felt nothing, but with that side now much safer, or as safe as could be in the situation, Nick followed up with a move to the back of the Titans neck. The killing blow was quick, textbook in its execution, if a little stiffer than one needed in the field.

With a ragged gasp the Titan stopped running and fell to its knees. Smoke rose from the gaping hole now present in its neck, the chunk of flesh cut away sent somewhere else from the force of Nicks attack. Hitting the ground no longer moving or making any noise, smoke began to wisp off the Titans skin, the sign that it was truly dead. Next to its body was a massive pile of blood that too had smoke seeping away, the liquid evaporating into nothing just like the body was doing, though with the amount it would be some time before it was all gone.

The four soldiers on horseback pulled back on the reigns gently until their steeds came to a halt. This allowed Nick, Audrey, and Philippe to catch up and situate themselves on a horse with another soldier. The one left alone on his horse was Hicks, the captain assigned to this particular group for the mission. His face was set in a frown as he stared down Nick. "Sloppy as usual Tatopolous, even after all the training you still have moments where you're second-guessing yourself."

For his credit Nick merely scratched the back of his neck, red dusting his cheeks slightly. Hicks shook his head, then smirked at the body of the dead Titan. "Good work though team. Didn't get out as far as we wanted, but at least that's another monster dead that won't be feeding on us. Let's get back home before more show up."

With positive 'Yes sirs' the squad set off towards the Walls at a quick pace. Their horses were tired from outrunning the Titan, but so long as they didn't push too hard the animals would make it just fine. It would probably be around nightfall when they made it back. Of course, had they stayed, they may have witnessed something extraordinary that would not be explained or understood for quite some time.

Several feet away from the dissolving Titan blood the ground moved about for a second until a small, green shape emerged from the soil. The creature sniffed at the air, turning its head in the direction of the blood, and with some struggling pulled the rest of its tiny body out of the ground. It was an iguana, or something very close to it, and looked to be an infant at that. Greenish-black in color and a bit on the skinny side, the iguana looked around to make sure no predators were near before slowly moving towards the blood. The animal was hungry, thirsty, and a bit lonely as well. It did not know where its mother or siblings were, and several hours had passed since it last ate.

The chance to reunite with kin was small with all the Titans walking around. While they did not attack things non-human the giants were oblivious to what they may or may not step on, resulting in many creatures being killed by pure chance. While some could run away or get to shelter, others did not have that luxury. This iguana was indeed very lucky to be alive at the moment, if a little starved.

With the distance finally closed the iguana opened its mouth and began to sip at the Titan blood. It didn't taste very good, but to the infant it served the purpose to ease its thirst. So the reptile continued to lap up the liquid for another minute, filling its stomach until a feeling of fullness was reached at last. Most of the blood had evaporated at this point, but the creature was no longer thirsty so that did not bother it. It was now time to find actually food, perhaps a few dozen insects or maybe a fish if a lake could be found. However, before the iguana could crawl somewhere else, terrible pain racked through its tiny body. A harsh burning sensation flashed under scaled skin, followed by several powerful convulsions that left it unable to hold itself up. The reptile growled in pain, not able to do much of anything else as the burning feeling and convulsions continued. Small eyes closed awaiting for the end to come, whether from death or when whatever was happening stopped.

It was 2 hours later when the iguana couldn't feel pain of any kind anymore. Though, it felt very different than it had before drinking the Titan blood. Slowly the reptile opened its eyes, the orange orbs seeing things from a higher perspective than before. Groaning at the feel of sore muscles it tried pushing itself off the ground, only to stumble and falter when its limbs responded different than it was used to. Where once he needed to support most of his weight using his front legs, now the two limbs felt like they were oddly placed on his body for such a task.

Shakenly trying to stand again this time he put more effort into it with his hind legs. Slowly, but surely, the iguana maneuvered his legs into a position that felt comfortable and pushed up. His legs were unused to being used like this, but keeping strong and not moving too quickly he stood at full height at last. Before all the pain he'd been a small creature not even 6 inches tall. Now he stood 1.7 meters tall, his length from the tip of his nose to the end of his tail he was 3 meters, instead of one rows of scutes down his back he now had three, though they were small and undeveloped as he was so young. Turning his neck to look further at himself the reptile saw that the legs supporting him were skinny and oddly bird-like in shape. He stood digitigrade now instead of how before his feet had been flush with the ground. Interestingly both his feet and hands only had four toes/fingers now instead of five.

Looking at his front legs they had changed slightly, now more like a pair of arms instead of a second pair of legs. They rested comfortably close to his chest, but with some quick movement he learned they responded easily. Perhaps digging would not be a problem as he worried. With the body of the Titan and its blood long gone the mutated iguana did not know where to go from here. However, he decided to test out his senses and was pleased to find that his sense of smell was much greater than it had ever been.

The scent of the humans that killed the Titan still lingered in the air, though just barely, and presented a clear trail through the forest. Had his body not been changed his nose wouldn't have picked up upon the dying scent. So, with no other real paths to follow at the moment, and remembering that those humans had basically provided him 'food' when they spilled the Titan blood upon the ground, the reptile took a shaky step forward, then another, and another. Slowly getting used to walking upon two legs instead of four, and constantly adjusting his center of gravity, the tall animal set out for wherever the humans went off to.

Shiganshina District

A young blonde boy hid behind a tree as stealthy as could be, peaking an eye around the bark to watch his prey. Taking a deep breath the boy tensed his leg muscles and got ready to attack. Two more seconds passed before he ran out, several quick strides over the grass and a semi-impressive leap into the air. Unfortunately the cute looking bird that had been pecking at the ground for food was smarter than the boy. Instead of taking off in flight it hopped backwards once, putting itself just out of reach from the 9-year-old child.

Hitting the ground with a gasp of air forced from his lungs, Armin Arlert groaned pathetically at his 5th failed attempt of the day to catch this bird. He wasn't trying to hurt it, he just wanted to play with it, not really knowing that wild birds weren't supposed to be kept as pets. Finally raising his head up his vision was instantly filled with the red colored bird only an inch from his face, staring at him intently. A moment of odd silence went by of them just watching each other, until the bird lightly smacked him on the forehead with its large wing. It didn't hurt at all, but Armin's pride sure felt like a Titan had stepped on it.

Another look from the bird was given before it turned around and flew into the air, long tail trailing behind it, deciding that further torture of the human boy could come later. Armin sighed before smiling and giving a small wave to the bird. "Bye Quetzalcoatl, I'll see you again soon!" The bird gave no response as it soared in the direction of the Wall, apparently wanting to explore some in the Titan-filled wasteland. Smiling to himself Armin walked back behind the tree to grab his bag and start heading home. His grandpa would want him in for lunch soon, and today the blonde had been promised some chicken stew. A meal like that wasn't exactly rare for someone living in Shiganshina, but it was portioned carefully so as to not go through every chicken a family might own.

Armin didn't make it three steps when the ground in front of him began to crack and separate. The boy didn't get much of a chance to do anything before some kind of….lizard…thing had clawed its way out of the ground and stood before him on two feet. Standing at 1.7 meters the creature seemed to tower over Armin, who only reached 4'4" at this stage of his life. The creature looked around the area for a moment before setting its sights on Armin. It sniffed the air several times in various directions and once more looked at Armin, sniffing again, then started walking towards the boy.

Armin's eyes were wide as could be, watching the creature take steps towards him. For each step the lizard took Armin backed away in turn, until his back hit the tree he'd been hiding behind. His hands shook, covered in a film of sweat, and did not raise to defend himself when the creature was only a foot away. He wanted to scream, he should scream, do his best to attract the attention of adults. When the lizard sniffed him again, its head almost touching him, Armin thought for sure he was going to die. People had always feared the Titans outside the Walls, yet here was some unknown reptile inside humanity's sanctuary about to eat him. It was…huh?

The creature was nuzzling the bag hanging off his shoulder curiously, making some kind of low-pitched screeching sound. Why…would…..it…..reaching into his bag slowly Armin pulled out the only thing there: a loaf of bread his grandpa had given him in case he got hungry during his time outdoors. The second the bread was in the open the animal became visibly excited, grabbing the loaf in its teeth and chewing it to bits within seconds. Once the loaf of bread was eaten the reptile nudged Armin's chest before licking the blondes cheek with a slimy tongue.

"Gah! Gross!" When just moments before the young boy had been terrified, he was now more or less a bit afraid, but more so he was curious and confused about this animal. "I…you're welcome?" Surprisingly, as if the thing understood what he said, it nudged his face, making cooing noises like some kind of happy baby. Odd, but perhaps whatever this thing was it was indeed a baby, or very young at best. Armin knew a little about animals, he was rather fond of them so what few books he could find about them he read, but he'd never come across an animal like this.

Now it was staring him in the eye, burnt orange meeting light blue, and even at 9 years of age Armin could tell there was intelligence behind those glassy orbs. It didn't attack, didn't hiss, or do anything aggressive in the slightest. Perhaps it wanted more food? The bread was all he'd brought with him, but maybe…..it seemed to want to interact with him. Perhaps….

"So…..what should I call you?" He was still a little nervous, but his fear had all but vanished by now.

'Hrrrrraaaaaa'

The reptile made a nasally sounding roar in response to his question. Armin wasn't sure if it was actually replying, or just making its call because he'd spoke. Either way he needed to find a name for his new….friend. "Hmmm, I'm not really sure what a good name for a big lizard would be. Although…lizard…..lizard…liz…maybe…Zilla?" It sounded like a solid enough name for the creature. It happily nudged him again, though unknown to Armin it was out of a desire to play instead of approval of the name.

The first group of humans it encountered had inadvertently saved his life by providing food. This small human, though at first smelling strongly of fear, had given him food as well and not tried to attack him. Granted the human was small compared to him, but he was still getting used to the changes in his scaled body, and so while wanting to play with the kind human, he too was wary. So far the encounter was proving positive however, though it understood none of the speech coming from Armin. Having been separate from his brood now for days, the altered iguana decided to instead attempt interaction and bonding with this human.

Zilla once more licked Armin's face with a coo, then playfully nipped at his shoulder. Armin for his part was grossed out by the saliva, and nervous from the sharp teeth being so close. "A-alright I'll play with you. Just…..just be easy ok?" Zilla promptly answered by putting his four-fingered hands around the boy and chewing on some of his hair. "Or….you can do that." Despite himself Armin smiled, happy to find such a friendly animal, strange as it may be.

Let me know what you all thought please! I enjoy finding out what people think about my writing.