Dimensional Anchor

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A green ray springs from your outstretched hand. You must make a ranged touch attack to hit the target.

Abjuration
Level Cleric 4, Sorcerer/Wizard 4
Components V, S
Casting Time 1 standard action
Range Medium (100 ft. + 10 ft./level)
Effect Ray
Duration 1 min./level
Saving Throw None
Spell Resistance Yes (object)

Any creature or object struck by the ray is covered with a shimmering emerald field that completely blocks extradimensional travel. Forms of movement barred by a dimensional anchor include astral projection, blink , dimension door, ethereal jaunt, etherealness, gate, maze, plane shift, shadow walk, teleport, and similar spell-like or psionic abilities. The spell also prevents the use of a gate or teleportation circle for the duration of the spell.

A dimensional anchor 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. Also, dimensional anchor does not prevent summoned creatures from disappearing at the end of a summoning spell.