In the astral reaches geometry is flexible, and distance and substance are influenced by nearby minds. In this highly subjective environment, the realm of Limbo stands out as the epitome of mutability.

Limbo is a storm of change, its only consistent feature the chaos that rules it. A few sages believe that the ever-changing riot of Limbo is spawned from the mad thoughts of a god of chaos. If that is the case, none have identified the god and retained enough of their sanity to tell the tale.

The geometry of Limbo changes from one moment to the next, causing any stable chunks of matter or benign space to shift and stretch constantly. Powerful minds and magics can quell the roiling storm to some degree, creating pockets peaceful enough to host small communities. Slaadi and githzerai are the most well-known denizens of this inhospitable plane.

Limbo observes the following planar traits in all areas that have not been “permanently” stabilized. Some or all of these effects are negated in various stabilized regions.

• subjective directional gravity.
• highly morphic. Nothing stays put on Limbo unless subject to special stabilizing effects. The inherent flux of the plane makes the flexible geometry of the astral reaches seem serene.
• sporadic element-dominant. Elemental dominance fluctuates without warning.
• strongly chaos-aligned. This effect is weaker in githzerai settlements, and absent in their monasteries.
• wild magic. Casters must make a level check against a DC of 20 + spell level to cast a spell properly. Failure produces colorfully erratic effects.

Typical stable sites in Limbo feature chunks of stone or earth up to half a mile across, with breathable atmosphere, and a consistent gravity orientation. The edges of these stable spaces may stretch and twist, but the enduring investment of their denizens (or powerful patrons) has produced a few patches of calm in the roiling sea. Stable sites may still be strongly chaos-aligned, but they tend to shed the highly morphic, sporadic element-dominant, and wild magic traits.