Ameron is a world very similar to Earth and over 6 billion years old. The major differences between Earth and Ameron are the land masses and the oceans. Recently there has been a cataclysmic battle that not only ravaged the lands of Ameron, but all the planes that surround it; the outer ,inner, elemental, shadow, etc. all collapsed upon one another and blanketed the land like a shroud.
Ameron today is split between dark and light literally; one half of the world is always cloaked in perpetual twilight.
The Planes War that made Ameron as it is today only ended seven years ago. While much of the land wasn’t altered, the parts that were became radically different.