A loud crashing sound was heard in the countryside as the spaceship crashed into a mostly empty field, the few cows that were in the area scattered upon hearing and seeing the large crash that had caused a fairly big crater to appear in the field. Inside of the damaged and broken ship the astronauts were scattered around, unfortunately only one of them had managed to survive.
He groaned as he lifted his face off the ground, his eyes widened to almost comical levels when he saw the rest of his crew lying around him, bleeding and with broken bones. He had no doubt that they were dead, especially given the way that their necks weren't the same shape as they were before the crash. He grunted as he forced himself to his feet, or at least he tried to before realising that he had broken his right leg.
"Damn," He looked at his leg, he was pretty sure that the bone sticking out of his leg was not normal. "now what the hell am I supposed to do?" He wondered, shaking his head. He paused when he heard a noise behind himself, he turned and gasped when he saw a pile of black goo right next to him. "What the...AARGH!" The goo cut him off by lunging at him, he screamed as he both felt and saw the goo disappear into his body. he took several panicked breaths before looking around. "Huh? Huh, hmm...I'm...I'm alright, nothing happened." He grinned with relief, unfortunately, his relief only lasted a few moments as shortly after he felt himself control of his body.
The astronaut gasped loudly, his body convulsed before he went limp, he fell face-first to the floor. A second later the black goo poured out of his body and slithered away, highly disappointed. The organism it had just left was an incredibly bad match, so bad that it hadn't stayed for more than a few seconds. It had stayed long enough to learn basic knowledge about this world.
Apparently, it was on a planet named Earth, populated with hundreds of different creatures, but the strongest creatures on this planet were no doubt the humans. Not physically the fastest or strongest, but they possessed a special type of cruelty and ingenuity that not all beings possessed, or at least some of them did. It decided that the best thing to do would be to keep moving, if it stayed too long then it was entirely possible for it to be captured by the humans that were no doubt going to come and investigate. It was possible that it could end with bonding, but more likely that the humans would lock it up and experiment on it.
The black goo slithered out of the crashed ship and continued moving until it left the crater and reached soft grass. It stopped for the briefest of moments before it continued moving until eventually, it came across another living being. A fairly big spider, deciding that even a small host was better than being out and exposed, the goo leapt towards the spider. The comparatively smaller creature tried its best to escape but the spider just wasn't fast enough.
The goo shrunk down and formed a second skin around the spider before taking control of the arachnid, it forced the spider to turn and then started using its control over it to make it run as fast as it could, which was a lot faster than normal thanks to the goos help. The goo had been able to learn from the astronaut that while animals had varying degrees of intelligence, it was humans that would fit it best.
Animals were far less complex, only concerned with survival and eating and other simple needs, humans were different, more emotional. They had wants, desires, feelings, perfect feeding for a creature such as itself. They wouldn't be easy to control, but they would taste so good. It had to get to a human, if it was careful then it would eventually find a good match. For the goo, the spider was the equivalent of having a bland biscuit to tie you over when you were hungry, not great but good enough until you get some real food.
It wasn't sure how long it took, but eventually, it came near some houses. Once close enough it disappeared into the spider, reducing the chance of being caught but still controlling the spider. It wasn't long before it spotted a human, but this one didn't look like a particularly good fit. Plus her voice sounded quite annoying.
"Oh, there, there," The overweight woman cooed as she bent down and roughly petted the dog in front of her. "I'm not a big fan of leaving the countryside either, but we haven't visited my brother in ages." She was apparently talking to the dog, it was hard to frown with pincers but somehow the possessed spider had managed it. On the one hand, he wanted far away from the irritating woman with the habit of talking to animals as if they could understand her, but on the other hand, this woman said she was leaving the countryside. It was possible that she was going somewhere more populated, giving it an increased chance of finding a new host.
A minute or so later a decision was made, the goo left the spider, allowing it to fall dead. The goo moved forwards, climbing up a nearby tree, it waited until the obese woman had turned away, then it leapt through the air and landed on the dog. The surprise the dog felt prevented it from being able to even attempt to stop it from taking over. The goo couldn't help but feel disappointed with the dog, it had the necessary tools to allow itself to be great, yet was content with being babied by the woman and had let itself become weak.
"Ripper, are you alright?" The woman asked the dog when she noticed it hadn't followed her like normal, after a moment she saw and heard Ripper bark at her before he began following her. Dismissing what just happened, assuming that he had just gotten distracted by something, she went towards the house to collect her belongings so she could go and visit her brother and his family.
It was a very long journey later that Ripper, the possessed dog, arrived in the Dursley's house followed by the woman that owned him, though the goo inside the dog had not enjoyed the trip much. Honestly, how could one woman fuss so much over a creature that only needed food, water and some entertainment? One would have been forgiven for thinking that the dog was a newborn baby with the way that the woman was treating it. Once inside the house, the dog followed the overweight woman into the living room.
"Hello Marge," A voice said, and the possessed Ripper took the opportunity to look around the room and see what it was working with, he paid attention as Marge (the insufferable woman he was unfortunately with) began conversing with the people in the room. Greeting the woman was an obese man, even fatter than the woman, with balding hair and a large moustache. Apparently, he was the woman's brother, a man called Vernon Dursley. Along with the man was a blonde woman that would be noticeably skinny, even without standing with the two other overfed humans. The woman was called Petunia and was Vernon's wife. The third human was sat down, watching TV without a care in the world, not even responding to Marge hugging him and fussing over him. The fat, blonde-haired boy, was the unfortunate result of coitus between Vernon and Petunia and was called 'Dudders' or 'Dudley', the goo was pretty sure that one of those was a nickname.
"You're still here, are you?" Ripper heard Marge say to someone else in a less than friendly tone. Ripper turned and saw a boy standing in the hallway outside of the room. He was dressed in clothes that seemed to be too big for him, he had rounded glasses that didn't look all that cared for, unlike the rest, he had messy black hair and bright green eyes.
"Yes." The boy said shortly.
"Don't say 'yes' in that grateful way," Marge glared at him. "you are lucky that my brother was nice enough to keep you." Ripper paid close attention to the boy as Marge continued to rant about how ungrateful the boy was. The creature possessing the dog had access to the dog's memories and could call up memories of chasing and attacking this boy when he was younger, the boy was called Harry Potter, but the Dursley family preferred to call him 'freak'. It could see the boy restraining himself as Marge continued speaking, it could see the way that the boy wanted to lash out and how he did his best to prevent himself from doing so.
'Interesting,' It thought to itself. 'the boy shows plenty of promise, who knows how many emotions he was holding back?'
"Take Marge's luggage upstairs," Vernon ordered the boy.