Otherworld

This spell places the druid or another individual in a special dual existence with respect to the Positive and Negative Material Planes. The affected being temporarily exists in the same body in these planes at once, and its perception is extended to both.

This allows the affected being to effectively combat creatures with a similar dual existence. Creatures with a dual existence on the Negative Material Plane (many undead) are the most common, and the affected being can see them clearly, converse with them if desired, and engage in combat with them on equal terms. A being in otherworld state is not affected by the energy draining and other special abilities of undead from the Negative Material Plane, but still takes physical damage from them when struck. Likewise, the affected being need not have magical weapons to hit these creatures. Those killed in the otherworld state have a 75% chance of being trapped in the Inner Planes and unable to pass to the Outer Planes (and thus cannot be raised, resurrected or reincarnated, but can be wished back). They often reappear as undead spirits of various sorts.

The otherworld spell can be cast only in the dark. Sunlight breaks the spell immediately and forces the affected individual back into unitary existence on the Prime Material Plane.