Spells and Magic Version
When a priest casts this spell, he creates an invisible force field or barrier that blocks the entrance of animated or living mineral creatures. It is effective against elementals and creatures of elemental origin such as aerial servants, djinns, and mephits; golems and other constructs; creatures of living stone, such as galeb duhr or xorn; and objects, weapons, or armor animated by some outside force. It does not bar the passage of undead monsters, living creatures carrying inanimate material, or nonanimated minerals such as a giant-thrown boulder or a common rockslide. The anti-mineral shell moves with the caster, but if the caster tries to force it against a creature affected by this spell, the anti-mineral shell fails.
The material component is a drop of some caustic solvent, such as acid from a black dragon.
Priest's Spell Compendium Version
The anti-mineral shell spell creates an invisible, mobile barrier that keeps out living or animated mineral creatures and animated mineral objects. It is effective against elementals and creatures of elemental origin, such as crysmals and certain mephits; constructs, such as golems and living statues; creatures of living stone, such as galeb duhr or xorn; and mineral objects, weapons, or armor animated by some outside force Any attempt to force the barrier against such creatures or objects shatters the barrier immediately. The spell lasts for one turn for each experience level of the caster.
The material component is a drop of some caustic solvent, such as acid from a black dragon.
Notes: Uncommon for druids (PO:SM). Updated from previous publication.