Wall of force

Wall of force (originally called Shan's forcewall ) was an evocation spell used by arcane casters to create and invisible force field. Some clerics of deities with powers over darkness were also granted this spell. Oathbinder genies, a type of tasked genie, could create a wall of force effect innately.

Effects
The spellcaster could choose the shape of the wall, provided it remained in a plane. He or she could place the wall within close range, and it would last upwards from about minute in duration or until breached.

The wall of force created by this spell was impervious to most forms of damage and to magic, but it was known to be weak to the disintegrate and mage's disjunction spells and to rods of cancellation and spheres of annihilation. The wall blocked creatures within the ethereal plane as well.

Components
In addition to verbal and somatic components, the caster required a pinch of powder ground from a clear gem (such as rusteen ) to cast this spell, which vanished.

Notable Users

 * Esklindrar Iol, a sage from Silverymoon
 * Yashar, a male medusa who guarded the Undying Temple

History
The spell was invented by the Netherese arcanist Shan in 3235 NY (−624 DR)&mdash;his final recorded spell.

Notable Uses
Walls of force were used to block the exits to the ruins of a school of wizardry located in the Highbank Forest. They were also used in the construction of the fifth region of the Sevenfold Mazework within the Great Dismal Delve on the Elemental Plane of Earth and in the architecture of the High Temple of Mystra on Mount Talath in Halruaa. Such walls were used in the defense of the House of the Loregiver, the Vault of the Word of the Loregiver, and the Hall of Ashes in Huzuz, Zakhara.

During the Time of Troubles in the Year of Shadows, 1358 DR, an avatar of the goddess Shar used wall of force to deflect an ice storm hurled by Kyriani.