Clashing Rocks

You create two Colossal-sized masses of rock, dirt, and stone and slam them together against a single creature between them. The clashing rocks appear up to 30 feet away from the target on opposite sides and rush toward it with a mighty grinding crash. You must make a ranged touch attack to hit the target with the rocks. The clashing rocks ignore concealment. A creature struck by the clashing rocks takes 20d6 points of bludgeoning damage and is knocked prone. If the clashing rocks miss the target, the target still takes 10d6 points of bludgeoning damage from falling rocks and is knocked prone. A successful Reflex save reduces this damage to half and the target remains standing. Creatures other than the target that occupy the spaces where the clashing rocks appear or within their path must also make Reflex saves or take 10d6 points of bludgeoning damage and be knocked prone (save for half and remain standing).