Your shout distracts your enemies. Starting from your square, the power of your shout extends in a 15-foot cone. Any creature caught in the area that fails a saving throw is momentarily distracted. Affected creatures are subject to attacks of opportunity if any foes threaten the distracted subjects. If you threaten a distracted subject, you can also make an attack of opportunity.
If you spend 4 additional power points, the area of the power is transformed into a 15-foot burst.