Diablos

From The Dark Shadows Wiki

Diablos is another name for Satan. He appears as a man dressed entirely in black, with none of his body visible, including his head. It is said his son was Judah Zachary.

Diablos is rarely seen but frequently mentioned. Angelique claimed that her powers were given to her by Diablos himself. Angelique made contact with him to lift the curse of night from her and punish Nicholas Blair. He was not forthcoming and punished Angelique for her failure (628). He then turned his attention to Nicholas, whom he gave a deadline to fulfill his plans, but warned Nicholas that unless he was able to bring an innocent to agree to live in Hell, then he would be be be sent there forever (629).