With a subject of robust enough health, the infusion pioneered by Dr. Arrun grafting technique was utilized to graft within you a remarkable gift. The metal's durability and resilience make your body difficult, to near impossible to break, you gain the following benefits:

• Increase your Constitution score by 1, to a maximum of 20.
• When you roll a Hit Die to regain hit points, the minimum number of hit points you regain from the roll equals twice your Constitution modifier (minimum of 2).
• Your unarmed attacks are bolstered, granting a 2d4 bludgeoning damage bonus
• Your body can shrug off Critical hits due to your reinforced structure
• You are slightly slower as a result of the risky(?) procedure.
• Your weight doubles.
• Your skeleton makes you more vulnerable to lightning