I don't know how long it had passed, but when Sun Jack woke up again, he noticed something different about his body.
He touched his abdomen and could feel a layer of something between his skin and muscles. This was the Subcutaneous Armor, capable of defending against kinetic weapons. To be honest, the feeling was a bit strange, but tolerable given the benefits it provided.
Reading through the prosthetic usage introduction on the system interface, Sun Jack realized he had indeed found a treasure. This Subcutaneous Armor could not only block bullets and prevent cuts from sharp blades, but it could also withstand the explosion of some grenades.
Of course, it still couldn't defend against electric arcs, but that wasn't a problem. In Metropolis, apart from himself, he doubted anyone else would still use such a primitive method of attack.
With this layer of protection, the next time he had a fight with someone, he wouldn't have to start with a serious injury every time.