Fernia, the Sea of Fire is a continually burning landscape. Plates of compressed ash and debris float atop oceans of liquid flame as mountains ooze with molten lava.
The plane of Fernia is comprised almost entirely of liquid flame. Fire constantly rages, without the need for air, and what little air exists ripples with the heat of continual firestorms. A large landmass of ash is said to sit at the center of Fernia. On it is the mythical City of Brass, where the efreets call home.
Coterminous: When coterminous, Fernia generates intense heat on Eberron, especially surrounding volcanoes. Air temperatures can reach as high as 140°F, causing pain when breathed in. Existing lava or magma pools become hotter. At areas of high heat (like volcanoes or lava pools), inhabitants of Fernia can cross over into Eberron. In these areas, fire spells become more powerful.
Remote: When remote, areas of great heat on Eberron (volcanoes, lava pools) become more intense. Outside of those areas, casting fire spells become more difficult.