Shatterbone

This spell brings into being a stationary beam lancing out from the caster's body in a direction (and angle, from vertical to horizontal) chosen by the caster. The beam is visible as a shimmering gray area. All undead creatures touched or enveloped in this beam who are least partially corporeal (solid) suffer 4d4 points of damage. Skeletons destroyed in this way burst into motes of dust rather than collapsing into bones that can be salvaged.

The material component of a shatterbone spell is a mineral crystal, cut gemstone, or a faceted "gem" made of glass through which the bright midday rays of the sun have shone