The Pseudo Sun

"The sun, a marvelous orb in the center of the sky. Upon dawn, it cracks from the inside and heats up until its surface is liquid, infernal and shining an unsurpassable light. At dusk, its surface hardens and its light fades, until all that is left is a black stone to be orbited by the mock moon until dawn. this cycle repeats itself every 24 hours." Occasionally, metallic comets fall from the sun.

These can be smelted into Blacksteel, a metal with incredible properties used for both armor and weapons.

The sun is worshiped by influential cults as a symbol and a protector of those who bask in its light.