The Demon Arms also known as Serpent Heads are physical manifestations of The Darkness that protrude from your back and serve as your primary weapons. They devour hearts that replenish health and Darkness Energy

Their weakness to direct light

serves as the primary attacking serpent as it has blades protruding from it's form

The left Serpent head is different in its design as it has a domed forehead that looks like a battering ram. It's lower jaw protrudes outwards a bit and it has bony growths/horns protruding from the sides of it's head. This arms serves as the stronger attacking serpent as it is used to hold up objects in use such as car doors, gas tanks and even people while the right arm is free to attack

You are the host of the darkness, evil/chaos incarnate