Spells (3e)

A wall of force spell creates an invisible wall of force. The wall of force cannot move, it is immune to damage of all kinds, and it is totally unaffected by most spells, including dispel magic. However, disintegrate immediately destroys it, as does a rod of cancellation, a sphere of annihilation, and Mordenkainen’s disjunction. Spells and breath weapons cannot pass through the wall in either direction, although dimension door, teleport, and similar effects can bypass the barrier. It blocks ethereal creatures as well as material creatures (though ethereal creatures can usually get around the wall by floating under or over it through material floors and ceilings). Gaze attacks can operate through the wall of force.

The caster can form the wall into a flat, vertical plane whose area is up to one 10-foot square per level, or into a sphere or hemisphere with a radius of up to 1 foot per level.

The wall of force must be continuous and unbroken when formed. If its surface is broken by any object or creature, the spell fails.