Talk:Bending Arts/@comment-207.244.177.171-20111008172813/@comment-24.117.107.182-20111009040025

These are all forms of bending derived from the four primary elements. Metal is purified earth, and thus is a form of earth bending. Mud is water and earth, and can be performed by one skilled in either element. Blood contains water, and can thus be controlled by a water bender.