Boneblade

''The boneblade is a savage twist in the ever-changing flesh of those who inhabit the deep and lonely places of the world. A razor sharp protrusion of gnarled and fused bones forms below the elbow. The hand and fingers obligingly drop away and the transformation of the arm from tool to weapon is complete. The jagged edge causes grievous bleeding in foes. Perhaps this is why many who find themselves with bladed arms fall into mercenary corps and gangs of violent brigands.''

Limbs with natural weapon mutations cannot wear standard armor. Custom armor tailored to the limb can be purchased from armorers at 5 times the cost of standard armor, but can only be worn on this particular limb.