Enlarge Person, Mass

Transmutation
Level: Artificer 4, Bloodrager 4, Sorcerer/Wizard 4, Summoner 3
Components: V, S, M (powdered iron)
Casting Time: 1 round
Range: close (25 ft. + 5 ft./2 levels)
Target: One humanoid creature/level, no two of which can be more than 30 ft. apart
Duration: 1 min./level (D)
Saving Throw: Fortitude negates
Spell Resistance: yes

This spell functions like enlarge person, except that it affects multiple creatures.