Antreas

Born from the fusion of two worlds into one when a planar boundary collapsed, the world of Antreas is half a planet hurtling through space. It has two moons orbiting it, but their orbits are irregular and will eventually smash into the planet, likely obliterating it entirely. The planar collapse, known as the Shattering, also brought about a large amount of supernatural and metaphysical events, known to locals as Calamities, such as portals to even more planes, beings being stranded from other worlds, and undead creatures appearing without anyone summoning them. These events have fractured the old civilizations into squabbling factions, each vying for power and territory against the others.