Hunter's Howl

Necromancy [fear, mind-affecting, emotion]
Level: Hunter * 1, Ranger * 1
Components: V, S
Casting Time: 1 Standard Action
Range: 20 ft.
Area: 20-ft.-radius burst
Duration: 1 round/level
Saving Throw: Will negates
Spell Resistance: none
  With a single primal howl, you strike Fear in your opponents.
  Until the end of the spell's duration, you treat those affected by it as if they were your favored enemy, gaining a +2 bonus on weapon attack and damage rolls against them, and a +2 bonus on Bluff, Knowledge, Perception, Sense Motive, and Survival checks against them. If an affected creature is already one of your favored enemies, it is Shaken instead. This is a mindaffecting Fear effect.