Vishvalic had dark blue colored skin, which was covered in veins, he had a large mouth on his head full of sharp teeth.
Assumedly Vishvalic could use his head jaws to bite into and tear flesh.
Vishvalic is one of the demons seen at the Black Sabbath. He is killed by Akira Fudo who had fused with the demon Amon. Akira grabs Vishvalic's top mouth by both sides and rips it open splitting his head in half.