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A sea of liquid shadows laps against black sands and basalt cliffs. A skull lies half-buried in the sand, empty sockets gazing into the roiling mist. The bone isn’t sun-bleached, for there is no sun here—only a faint glimmer from the smoky gray moon that hangs in the sky.

Early scholars studying reports of Mabar concluded that it was the Plane of Darkness—that this physical property is its defining concept. However, the plane’s eternal gloom is just a symptom of its true nature. Even the brightest day eventually ends in darkness, and Mabar embodies this idea. It’s the shadow that surrounds every island of light, patiently waiting to consume it. It’s entropy, despair, and loss. This isn’t the place where the souls of the living go after death, but rather, it’s the plane of death itself—the hunger that consumes both light and life.

Mabar is the source of negative energy, and the origin of most undead. Manifest zones—and most undead—tied to Mabar consume the life force from the world around them. However, some people maintain that negative energy itself is just a tool, and that the power of Mabar can be harnessed for good.