Korundum

Korundum is the homeworld of Kamen Rider Hex, as well as his foes.

Description
Korundum is mostly a tropic world, with wide stretches of desert at its equator and rainy forests near the poles. It is accessible to Earth through portals.

Inhabitants
There are two sentient species: the Overfolk and the Underfolk. Overfolk are humanoid (in fact descended from ancient Egyptians), with darker skin and slanted eyes. Underfolk are human-sized bipedal rodents that resemble badgers or moles. Instead of fingers they have curved digging claws; they are covered in fur; their vision tends to be poor, but they have a powerful sense of smell; most have stripes from the nose running down to the tip of the tail. They prefer to live in caves or underground. Some of them have the ability to control the dead.

History
Overfolk arrived so long ago that nobody is quite sure where they came from or how they reached Korundum. Underfolk are probably the native species of Korundum; at the very least they lived there for millennia. The Overfolk became dominant about a hundred years ago, when they used special suits of armor to wipe out the resisting Underfolk and unite the planet under their rule. The Underfolk were badly abused by them, treated as slaves and hunted every seven years so they wouldn’t grow too populous—also for their fur. In order to prevent them from using their necromancy to fight back, they declared it witchcraft and executed any practitioners they caught.

Trivia

 * The Underfolk hunts are inspired by the Krypteia.
 * All Underfolk names are gemstones.