Dimensional Lock

Player's Handbook v.3.5 (PH)Updated Core (3.5)

Dimensional Lock is a D&D 3.5 spell (Abjuration) from PH. On class lists for Cleric (Level 8), Sorcerer (Level 8), Wizard (Level 8), and others. Range or area: Medium (100 ft. + 10 ft./level); Saving throw: None; Duration: 1 day/level; Casting time: 1 standard action.

School
Abjuration
Casting Time
1 standard action
Components
V, S
Range
Medium (100 ft. + 10 ft./level)
Area
20 ft. radius emanation centered on a point in space
Duration
1 day/level
Saving Throw
None
Spell Resistance
Yes

You create a shimmering emerald barrier that completely blocks extradimensional travel. Forms of movement barred include astral projection, blink, dimension door, ethereal jaunt, etherealness, gate, maze, plane shift, shadow walk, teleport, and similar spell-like or psionic abilities. Once dimensional lock is in place, extradimensional travel into or out of the area is not possible.

A dimensional lock does not interfere with the movement of creatures already in ethereal or astral form when the spell is cast, nor does it block extradimensional perception or attack forms, such as a basilisk’s gaze. Also, the spell does not prevent summoned creatures from disappearing at the end of a summoning spell.