Jayce was born to an entirely normal family, the likes of which had no special talents, no legendary mages in the family tree, no nothing. The only thing the Velstadt men had ever been known for was their devotion to their work, whatever their craft may be, regardless of their personality. Jayce was the same way, he devoted himself to everything he did, even if he hated it. From an early age, he had a fascination with machinery, especially magic vehicles, and as such tinkered and tinkered with whatever bits of scrap he could get his hands on for free; though admittedly that included things that weren't his. Over the years he simply got better and better at putting things together, simply form memory, so much so that he became the first member of his family to be considered a prodigy. By the age of 14, he could build an entire magic buggy from scrap, take it apart, and put it back together again in under 6 hours.

At the age of 16, to get the money he needed to continue his career as an engineer, he joined the Fioran Rune Knights. Things were going smoothly until his unit's first real dispatchment, the job was an odd one: Find out what happened to a town along the border that's entire population. They found nothing, not even a single trace of a single person left in the town, and they left absolutely no stone unturned. No signs of a struggle, no blood, not even a dropped cup. It was as if all of the townsfolk simply...vanished.
And then so did the Knights while they weren't looking. At first they just assumed the rookies went AWOL, but soon even their commanding officer vanished without a trace. Being one of the last three left, Jayce decided that whatever was there, they couldn't handle it, and so got the other two knights and fled the town. However, what had taken the people didn't like it's prey just up and leaving. Before they made it more than one mile out of the town, something assaulted his two companions behind his back. Stealthfully, and without a single sound made, the two vanished as well, and it took Jayce a full minute to even realize that they simply weren't there anymore.

After noticing he was the last alive, he ran. He ran as fast as he possibly could to escape from whatever was in the town, or rather what was after him. In his attempt to escape, he suddenly felt...lighter. Particularly on his right side. A glance to his right side informed him that his right arm was...gone. There was no trace of any sort of bite or cut, it was as if the entire thing simply faded from existence, though the pain quickly shot through him as his body realized his arm was gone. Writhing in pain on the ground, he attempted to crawl in a last desperate attempt to get away from whatever that thing was, though the trail of blood from his arm gave him away all too easily. As he bled out in the brush of the local forest, he wondered if this was really how he was going to die, alone and without a trace of his body being left behind. In his 'supposed final moments', he saw something, something not human. It was a beast with the body of a canine with jet black fur, with eyes as red as a blood-soaked moon. The eyes had an almost...insect like look to them, no pupils or scilera visible at all. Fur-covered appendages extended all along it's lower torso, almost like extra sets of legs that simply stood upright, as if poised to move. Looking over the beast, he sighed and simply said: "Go on...finish it." The final blow never came.

The beast turned immediately and lunged at something unseen, something horrifying that was now on the receiving end of pain. He couldn't see what it was, whatever it was, only the dog-like beast could see it, but he was never more happy to see a wild animal. The beast somehow treated his stub of an arm, and followed him back to the safety of Magnolia, where he resigned from the Knights after what he'd seen happen. Inspired by the strength of his new animal companion, Jayce vowed to become strong enough to defeat that invisible beast himself, and that he would need both his hands to do it. Constructing a new arm with the help of the animal, which he now called "Noire" (Turns out it was a girl. Who knew?), he trained relentlessly to grow stronger, becoming the Velstadt family's first mage. With a goal in his mind, he decided to join Fairy Tail with Noire at his side, ready to use his new strength along with her's to help the people of Fiore, and to track down the nightmare creature.