Rockburst

This spell allows the caster to cause a boulder or rock pile to suddenly explode, propelling jagged shards in all directions. If the desired spell focus is larger than the volume the priest can affect, only part of it flies about.

Shrapnel endangers all beings within 20 feet of the spell focus. Beings within 10 feet must save vs. spell for half damage. Beings between 10 and 20 feet distant who save successfully are allowed a second saving throw. If both rolls are successful, they avoid all damage (due to luck, dodging, and cover). If only one roll is successful, they take half damage. The presence of cover or armor does not automatically lessen damage due to the unpredictability of ricochets, bounces, and the like.

The shrapnel does a base damage of 1d4+1 points per level of the caster (i.e. 1d4+1 points per cubic foot of rock). In rare cases, the explosion might remove enough rock to cause an avalanche or cave-in, but such results cannot be caused deliberately with this spell.