Shadow Evocation (Shout)

You tap energy from the Plane of Shadow to cast a quasi-real, illusory version of a shout spell. Shout: You emit an ear-splitting yell that stuns and damages creatures in its path. Any creature within the area is stunned for 1 round and takes 5d6 points of sonic damage. A successful save negates the stun and reduces the damage by half. If an affected creature succeeds at a Will save to disbelieve, it takes only 20% damage from the attack.