 
Diamondhead is a crystalsapian. He is bens third transformation which appeared in And Then There Were 10.
Appearance
He is a large walking crystal. He has yellow eyes and has a outfit matching his human forms.
Abillities
He can shoot crystals out of his hands and can also turn his hands into sharp large crystals. He can break through almost anything as nothing can not break him.
Appearances
Ben 10