Lord Cob, or simply known as Cob, is the main antagonist of the 2006 anime film Tales From Earthsea.
Lord Cob was once a skilled but dark wizard banished to the Dry Lands by Sparrowhawk for controlling the dead so he could become the Archmage wizard himself. In order to survive, Cob built a fortress entirely made out of dragon bones. After spending years of studying black magic, he planned on opening the door between life and death to gain eternal life by upsetting the world's balance.
And he is reprised by Willem Dafoe in the English dub and Yuko Tanaka in the Japanese dub.