You call forth an arrangement of stonelike slabs in a 10-foot-diameter circle and charge them with psionically destructive energy. This â€œcromlechâ€ of ectoplasmic vintage reverberates with a physical storm of psionic interference within the circle it encloses. It deals damage to any animate creature within the circle to a height of 20 feet above the circle's floor (see illustration on the previous page).
At your command (as a swift action), the cromlech widens in radius at a rate of up to 10 feet per round (up to a final maximum 100-foot diameter). Each round, anything that enters the circle or is caught up in its expansion takes 50 points of damage. These attacks are psionic, so creatures with damage reduction are not safe. Creatures may be subject to the death by massive damage rule.
If a creature makes its saving throw, it takes no damage when the cromlech wave overtakes it.
For every 2 additional power points you spend, you charge your cromlech with an additional 10 points of destructive power.