Brittleskin

Brittleskin was a spell that caused the natural armor of a creature to become hard and brittle. If that creature were struck in combat, the crystallized tissue (such as hide, bone, chitin, scales, etc) would crack and shatter, causing more permanent and often lethal damage.
==References==
Category:Transmutation spells
Category:Druid spells
Category:Ranger spells
Category:Sorcerer spells
Category:Wizard spells