SRD:Ultrablast

You “grumble” psychically (which both psionic and nonpsionic creatures can detect), then release a horrid shriek from your subconscious that disrupts the brains of all enemies in the power’s area, dealing 13d6 points of damage to each enemy.

Augment: For every additional power point you spend, this power’s damage increases by 1d6 points.