Giant Robo - Season 1 Episode 12 Amberon, the Synthetic Monster

Unicorn members locate the secret headquarters of the Japanese Branch of BF Syndicate. They attack the house and arrest Dr. Over by taking his blue star-shaped metal on his chest, the source of his magical power. Daisaku leaves the metal with Marie, a young girl who has lately joined the organization. After having a narrow escape, Black Dia is told by Emperor Guillotine to take back Over by using Unabalan, a synthetic monster. Next day, Azuma is asked to investigatea strange case in Uano zoo. A python dies and a hard substance like a fossil is found in its belly. And all the snakes in the zoo are found dead. Azuma brings the substance to the headquarters and puts it in the medical room. That night, it turns into a dreadful monster and helps out Over from the prison by killing a guard.