Zone Of Truth

Enchantment (Compulsion) [Mind-Affecting]
Level: Clr 2, Pal 2
Components: V, S, DF
Casting Time: 1 standard action
Range: Close (25 ft. + 5 ft./2 levels)
Area: 20-ft.-radius emanation
Duration: 1 min./level
Saving Throw: Will negates
Spell Resistance: Yes

Creatures within the emanation area (or those who enter it) can’t speak any
deliberate and intentional lies. Each potentially affected creature is allowed a
save to avoid the effects when the spell is cast or when the creature first
enters the emanation area. Affected creatures are aware of this enchantment.
Therefore, they may avoid answering questions to which they would normally
respond with a lie, or they may be evasive as long as they remain within the
boundaries of the truth. Creatures who leave the area are free to speak as they
choose.