Dismissal

(Player's Handbook v.3.5, page 222, DnD 3.5)

Abjuration

Level: ; Cleric 4; Sorcerer/Wizard 5; Knight of the Chalice 4; Nar Demonbinder 4; Wu Jen 4; Sha'ir 5; , Balance 4
Components: V, S
Casting Time: 1 standard action
Range: Close (25 ft. + 5 ft./2 levels)
Target: One extraplanar creature
Duration: Instantaneous
Saving Throw: Will negates; see text
Spell Resistance: Yes

This spell forces an extraplanar creature back to its proper plane if it fails a special Will save (DC = spell's save DC – creature's HD + your caster level). If the spell is successful, the creature is instantly whisked away, but there is a 20% chance of actually sending the subject to a plane other than its own.