Stun Aura
This creature has the ability to generate an aura of stunning that completely surrounds it. Any hostile creature that enters this aura and fails a will saving throw gets stunned for 1 round per 20 character levels + 1 (maximum 3 rounds). DC = 10 + (caster levels / 2) + (caster levels / 8) + (wisdom modifier / 2).
Who gets it
A class may choose it: Barbarian, Bard, Cleric, Druid, Elite Guard, Fighter, Monk, Paladin, Ranger, Rogue, Sorcerer, Warlock, Wizard.
Granted by a race: Ogre Mage (at level 10).