Exoskeleton [MAJOR]

A thick exoskeleton forms over your skin. The exoskeleton usually consists of interlocking plates of bone or chitin covering 90% or more of your body.

MP Cost: 5.

Benefit: You gain a +3 natural armor bonus to Defense, or your existing natural armor bonus improves by 3.

Special: A creature with fur, scales, or the Scaly Armor mutation cannot gain this mutation.