Abjuration
Level: Druid 5, Purification 5
Components: V, S
Casting Time: 1 standard action
Range: 5 feet/level
Area: 5 ft./level radius emanation centred on you
Duration: 1 minute/level (D)
Saving Throw: None
Spell Resistance: No
Whirling your pointed finger through a complex gesture, you create a cool and fresh mist that cleanses the air of pollutants.
You surround yourself with a purifying, swirling mist that washes the air clean of smoke, dust and poisons. Non-magical contaminants, including inhaled poisons, are automatically negated within the cloud. Dance of the unicorn also grants everyone within the mist a +4 bonus on saving throws against magical or supernatural gas effects, such as acid fog, cloudkill and green dragon breath.
The cloud of mist leaves everything within its area damp.
Source: Spell Compendium (Page 58)