Decompose

This spell causes organic material to turn into humus or compost instantly. Up to 150 pounds of material can be affected. Living matter is not affected by this spell, although a corpse (even a fresh one) would be. Undead creatures that have corporeal forms are affected if they fail a saving throw vs. death magic. A magical item composed of organic materials (for example, a wooden spear +1) must make a saving throw vs. disintegration. Nonmagical items of organic composition (doors, rugs, etc.) receive no saving throw. Decomposed creatures can be raised, resurrected, or reincarnated if the dust is carefully collected and preserved.

The material component is a pinch of puffball dust.