Blood-Blood fruit. Back when I had it as a mutant power in a different RP, I described it as this:

-Powers: Hemokinesis, or the ability to manipulate his own blood. Steve can cause his blood to come out of his body and form weapons (like knives, swords, clubs, maces, staffs, spikes, spears, tentacles, etc.) or solid masses (he can change it's density to like, hard as a rock and use it as a platform, or elevator, or hand). Any blood that leaves his body is instantly replaced, making it impossible for him to die of blood loss. But his blood has to tear through his skin to come out, and he only has a minor healing factor. It takes like five minutes for a wound to heal, and he'd be bleeding the whole time. Seriously, it wouldn't take long to get a Carrie look going on, although he can keep the blood in his body, but it splits his concentration. Since his blood opens wounds in his skin, he doesn't feel pain in the same way we do. Rather than pain, his mind just kinda goes "Oh, there's a wound there, be careful" as opposed to "FUCK, IT HURTS!!!". Also he has Organic Pigment Augmentation, meaning he can change the color of his body on a cellular level.

That help?