Druid's Decay

Upon casting this spell, the caster can cause a single dead creature to decompose into dust. Alternatively, the spell can decompose 10 cubic feet or less of dead plant material, including objects made of wood. Items or constructions made entirely or partially of plant material (such as wood) must make a successful item saving throw vs. lightning or be destroyed. An item worn or held by a creature is unharmed unless the owner fails a saving throw vs. spell; upon failure the item must save vs. lightning or be destroyed.

This spell doesn't affect living matter. A single corporeal undead creature of up to 10 Hit Dice can be destroyed if it fails a saving throw vs. death magic. The spell cannot affect noncorporeal undead (ghosts, shadows, wraiths, etc.) or undead with more than 10 Hit Dice.

The material component is the priest's holy symbol.