I don't own Justice League or Fairy Tail just any OCs I may throw in and unlike in the prequel so far nothing from the Harry Potter series will be there just mentioned. Justice League shouldn't play any part after Mass Extinction arrives on Earthland.
Mass Extinction was helping clear a road after a big storm as a Gigantopithecus.. After she was done she got caught in a mysterious white light. The light cleared she then decided that she needed to shape shift for protection but when she shape shifted into a Therizinosaurus. She noticed that she was wearing a swim cap that was shaped like the top of the head, was holding two one meter long scythes, and wearing a red one piece swimsuit and clawed boots while commenting with this is different. She went into a forest and immediately was confronted by a green ape with lavender hearts on its arms. She defeated it with her scythes.
When she finally exited the forest she saw two boys a pink haired one and a black haired one fighting and a girl with long red hair and and an eye patch who knocked out the two boys. Mass Extinction noticed a strange emblem on three kids. She returned to normal and followed the trio back to where they came from but they sensed her. The two boys were preparing to blast her with fire and ice and Mass Extinction went into her Ankylosaurusform which has a yellowish brown scaly one piece swimsuit for armor with a sledge hammer in one hand, a domed oblong shield in the other, a helmet with four pyramid shaped horns on it, and clawed boots. She noticed that she was getting tired as she was panting, on one knee, and reverted to normal when the cycloptic red head stopped the boys. Mass Extinction noticed that she doesn't have any money and she decided to get a job. When the trio left Mass Extinction decided to go into town. She then borrowed a magazine from someone to learn more more about this Earthland place and found about something called wizard guilds and the that the guild called Fairy Tail which number one in popularity, power, and collateral damage she also read about the Strauss siblings and their Take Over Magic and she said, "That's what my powers seem to have become." She returned the magazine which is called Sorcerer Magazine. Mass Extinction decided to get some sleep first and on the next day she decided to shape shift into a passenger pigeon that form has a feathery bikini with wings, the top of a pigeon head for a skull cap, and bird foot style boots which flew. Then she saw the Fairy Tail guildhall, opened the door and went to the old short man watching over everything and asked, "How do I sign up?" The old man who introduced himself as Makarov Drayer who gave her some papers. She put Mass Extinction for her name, twenty-three for age, her magic as Take Over Extinct Soul, her height as six feet, and put down her weight. Mass Extinction then got her Fairy Tail Guild stamp on the side of her left hand in olive green.
She then went to the job request board and found a job that was looking for a lost bracelet some where in the East Forest which the job was only worth 20,000 Jewel. She made to the East forest and decided that she needs the eyesight of an Anomolocaris so she said, "Take Over Extinct Soul Anomolocaris." She had googles that worked a dowsing machine, crescent shaped serrated knives, a yellow orange one piece, and short yellow orange boots. She eventually found the bracelet but found an ape like like one she fought the day before yesterday so she blasted the ape with wind as well as slashing it with her knives. She dug it up as a Zaglossus hacketti returned the bracelet and received the reward.