Atavism, Mass

Transmutation
Level: Druid * 8
Components: V, S
Casting Time: 1 Standard Action
Range: close (25 ft. + 5 ft./2 levels)
Target: one animal/level, no two of which can be more than 30 ft. apart
Duration: 1 minute/level
Saving Throw: Fortitude negates
Spell Resistance: yes
  By bringing forth the primeval ancestry of the targeted Animals, you awaken a savage engine of destruction. The Animals immediately gain the advanced creature simple template.
  They gain a +2 bonus on all rolls, including damage rolls and special ability DCs, a +4 bonus to AC and CMD, and +2 hit points per Hit Dice. The Animals' primal instincts take hold for the duration of this spell-if the Animals know tricks granted by the Handle Animal skill, they lose access to all of those tricks save for "attack." This spell has no effect on Animals that already have the advanced creature template.