He is just a bone, brought to life by Evil Slayer's dark magic(x043). He has the ability to disarm and rearm in various creative ways, and has a calcium spell on him that makes him really hard and hard to break. If he's alone maybe you can take him on, but he always hangs out with other bones like him! Just a bone is one of the Bad Ones collectible pieces [X002 X008 X015 X018 X019 X032 X033 X034 X035 X043]