Scadrial is a planet of the Cosmere galaxy and is the setting of the Mistborn series. It contains several other planets in its system, which have not been discovered by Scadrial’s inhabitants. Scadrial has no moon, but there is an extremely bright patch of stars visible in the night sky. People from Scadrial are called Scadrians.
Scadrial is very similar to Earth, with one major exception. Ferrous ash constantly rains from the ashmounts, large active volcanoes which have spewed ash since prehistory, blanketing the sky in a grayish red hue. Vegetation is very slow-growing in this low light, however appears to be able to feed on the “ironfall”, offering some relief.
Humans rarely venture outside of the New Empire, and any who do only make it so far as Terrislands before they are never heard from again. As such, little is known of the world outside the New Empire, but it is assumed to be inhospitable to nomadic life.