Mercury

Mercury
Mercury is a character run by ThirdEmperor, Maxios's archnemesis, and the Nexus's most hated individual, largely due to mass murdering people for almost non-existant reasons.

Backstory
Mercury sealed a deal with a Daemon, a spirit of pure magic, when he was fourteen, gaining almost unlimited magical potential, with a heavy cost. Every time he used magic or lost control of his emotions, he ran the risk of having his soul eaten, reducing him to a hollow husk with only his worst traits left behind. He spent the next four years training in a magical academy, learning to control his talents, and graduated as the only surviving member of his class. A few years later, after an attempt on his life that nearly succeeded, Mercury was exiled into the Nexus by a experimental spell that failed, and has since been keeping busy with various acts of villainy.

Adventures in the Nexus
The first thing Mercury did upon arriving in the Nexus was join up with Maxios to quest for a massive trove of treasure and candy, which he promptly stole. After that, he dueled with Maxios on numerous occasions, which all ended in draws, Mercury's superior intellect matching Maxios's raw power. Eventually, he ended up accidentally killing quite a lot of people, and faked his own death to escape, which he later tried and failed to pin on Maxios. Eventually, he tricked Maxios into making a pact with a Daemon, forcing him to seek help from the only available source, Mercury.

Oh, and he nuked a couple of towns.