Fuoros is an Ulvania-sized planet in its early stages. It is covered in magma and volcanoes which erupt hourly. It orbits Sol just beyond Sollus Minor. It has one moon, Magmarr , which is also covered in a similar landscape to Fuoros and many theories exist stating that Magmarr and Fuoros were once a single planet.
Fuoros, in many cultures, is believed to be the site of Hell.