Wall Of Force | Tyrrapedia: Encyclopedia of Tyrra

Wall of Force - Bertold's Mystic Barrier
Level 7 – Celestial
"With eldritch force I build a Wall."

This spell uses a preexisting, free standing vertical frame to create a shimmering Wall of Force that will stretch no more than 10 feet across. The Wall will rise to a height of 25 feet or the height that will fit the frame.

The frame must be completely enclosed and the Wall of Force must be able to be placed vertically within the frame. It must be clear to all observers where the boundaries of the Wall are. Normal walls may be used as the sides of the frame, but the floor should be marked with a physical representation so it is clear where the Wall has been placed.

Two trees 10 feet apart or less would be an acceptable physical representation for a Wall of Force as long as a representation for the floor is indicated, as would any doorway or portal 10 feet wide or less. If all of the sides are clearly indicated by a portal, then a floor physical representation is not required.

Once the Wall of Force has been cast, the frame cannot be moved. Neither the Wall nor the frame may be Destroyed or Shattered. Normal traps will not affect it, although some Massive Mechanical traps may cause it to fail in a manner similar to the Imprison spell.

Wall of Force, Circle of Power, Ward, and Wizard Lock effects may not overlap in any way. These barriers may be within one another, but must always be fully within, or fully external to, each other. For example, you may surround a Circle with another Circle, you may put a Ward on a building that is fully within a Circle, etc. Celestial and Earth spells may combine freely for these effects.

Nothing may pass through the Wall once the Wall is cast, including spells, thrown gasses, weapons and creatures. Air may pass through, but other gases may not. A gaze attack such as a Vampire Charm can be effective through a Wall, as will a Gypsy Curse.

The wall will last for five days, but may be dropped by the caster at any time if he or she touches the frame and states “Wall down.” Any observers who hear the statement are aware that the Wall was dropped, and they might know who dropped it. The wall is also dropped if affected by a Dispel Magic.