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Boneshatter

School: Necromancy
Level: Cleric 5, Sorcerer/Wizard 4
Components: V, S, M (a broken bone)
Casting time: 1 standard action
Range: Close (25 ft. + 5 ft./2 levels)
Target: One corporeal creature or object
Duration: Instantaneous and 1 minute/level (see text)
Saving throw: Fortitude partial (see text)
Spell Resistance: Yes
The target’s bones or exoskeleton shiver and splinter, dealing 1d6 points of damage per caster level (maximum 15d6) to the target, who is also exhausted for 1 minute per caster level from the pain and exertion of the transformation. If the target makes its save, it takes half damage and is fatigued rather than exhausted. Objects made of bone, chitin, or similar material take half again as much (+50%) damage from this spell. This spell has no efect on creatures that lack both skeletons and hard carapaces.

Source: Osirion - Land of Pharaohs