Positive Energy plane

The Positive Energy plane, sometimes called the Plane of Life or the Positive Material plane, was an Inner Plane or Energy Plane of the Great Wheel cosmology and the World Tree cosmology models. After the Spellplague, the Positive Energy plane collapsed into the Elemental Chaos, mixing with all the other Inner Planes. Cosmologists believe that Positive Energy and its opposite Negative Energy, combined with the four elements, make up the known universe. This plane was a continuous explosion of energy not meant for mortals. Despite its nickname the Plane of Life could bring swift death to the unprotected by filling them with positive energy until their cells burst and they joined the conflagration.

Cosmology
According to the Great Wheel cosmology model, the Positive Energy plane could be reached via the Ethereal Plane or an adjacent elemental plane, but not by an elemental vortex. If traveling through the Deep Ethereal, a pure white curtain of vaporous color indicated the boundary of the Plane of Life's Border Ethereal region. Such was the power of the Positive Energy plane that the boundary with the Border Ethereal was weak and fluctuated randomly at times. Travelers thinking they were safe staying in the Border Ethereal could suddenly be dumped on the Plane of Life some distance from the rapidly receding border. Using the spherical model, this plane was adjacent to the quasi-elemental planes of Minerals, Radiance, Lightning, and Steam. Temporary gates could be created by the plane shift spell.

As described by the World Tree cosmology model, the Astral Plane connected all planes with the Prime Material Plane and the Ethereal Plane was only used for journeying between locations on the Prime. The Positive Energy plane was not connected or coterminous with any other elemental plane. The spell astral projection could be used to reach the Positive Energy plane via a shining white color pool. Additionally, the gate and plane shift spells could be used to open a temporary portal to this plane.

Description
"It is power incarnate. It is radiance beyond compare. It is life realized to the fullest."

- Manual of the Planes