Level: Sorcerer 5, Wizard 5
Components: V, S
Casting Time: 1 standard action
Range: Close (25 ft. + 5 ft./2 levels)
Targets: One creature/level, no two of which are more than 30 ft. apart
Duration: 1 minute/level
Saving Throw: Will negates (harmless)
As your gestures point out which creatures receive the benefits of your spell, they seem lighter on their feet.
The subjects can fly at a speed of 60 feet (or 40 feet for those wearing medium or heavy armor, or those carrying a medium or heavy load). They can ascend at half speed and descend at double speed, and their maneuverability is good. Using a mass fly spell requires only as much concentration as walking, so each subject can attack or cast spells normally. Each subject of a mass fly spell can charge but not run, and none can carry aloft more weight than its maximum load, plus any armor it wears.
Should the spell duration expire while any subject is still aloft, the magic fails slowly. Each subject floats downward 60 feet per round for 1d6 rounds. If it reaches the ground in that amount of time, it lands safely. If not, it falls the rest of the distance, taking 1d6 points of damage per 10 feet of fall. Since dispelling a spell effectively ends it, the subject also descends in this way if the mass fly spell is dispelled, but not if it is negated by an antimagic field.
Each recipient of the spell must remain within 30 feet of at least one other recipient, or the spell ends for the creature that is separated from the others. If only two individuals are affected, the spell ends for both if the distance between them exceeds 30 feet. In such cases, the spell ends as if it had expired as noted in the previous paragraph.
Source: Spell Compendium, page 96. Previously published in Complete Arcane, page 108. Changes to blend in the text of the fly spell were made.