Eric's Super Awesome Classic 3.5 D&D World (Name yet to be determined)
The area known as the Frontier was created when Cosmos, a planet eating celestial body, was summoned by Reavus, an evil wizard who manipulated the Kingdom of Runefaust and was ultimately responsible for the downfall of the kingdom. Reavus’ plot did not succeed however, because an elite group of imperial soldiers foiled the plan mid ceremony. Disaster was not completely diverted though as some debris from Cosmos’ tail was pulled away by the summons and plummeted to Earth striking the heart of Sylvestria, forever dividing the continent, and scarring the land with darkness.
Presently, the Frontier remains mostly unknown, as the mountains around it are filled with creatures tainted with cosmos’ evil energy, looking to snack on anything breathing. If adventurers or pioneers have made it through the mountains, nobody knows, because no one ever comes back to tell about it. Who’s to say if that’s bad or good, we’ll leave that call up to you…