School necromancy; Level bloodrager 2, cleric 2, druid 2, psychic 2, shaman 2, sorcerer/wizard 2, witch 2

CASTING

Casting Time 1 standard action
Components V, S, M (the knucklebone of a dire animal)

EFFECT

Range close (25 ft. + 5 ft./2 levels)
Targets 1 creature/level, no two of which can be more than 30 feet apart
Duration 1 minute/level
Saving Throw none (harmless); Spell Resistance no

DESCRIPTION

The bones of your targets' joints grow thick and sharp, protruding painfully through the skin at the knuckles, elbows, shoulders, spine, and knees. The targets each gain a +1 bonus to natural armor and a +2 bonus on damage rolls with natural weapons, and they are treated as having armor spikes, with which they are proficient.