This spell causes stone weapons to become equivalent to their bone counterparts, cutting their attack penalty from -2 to -1 (damage is the same). This spell is not as potent as stoneiron, but is far more common on Athas. One large weapon or two small weapons can be enchanted by a single casting of this spell; missiles lose their enchantment when used.
The material component is a piece of fossilized bone.
Notes: Uncommon for priests from the Dark Sun setting. (Updated from Dragon Magazine.)