This is Death Skeleton, another Elementoid. He's simply a robot skeleton. He has the power to clone himself. If you hit the original, you wipe out the clones. Because he lacks armor, he collapses from the slightest blow to him. However, he also has the ability to control his body parts even when they're scattered and can reassemble himself. He's also comically weak because he's defeated in every battle he participates in. The Kenny from South Park of the Elementoids. Except, the Elementoids actually acknowledge the poor writing. Because he's so weak, he was the easiest to purify of the corrupted Elementoids.