Yobial: A demon named in the Liber de Angelis, Yobial is connected with the planet Mars. He answers to the infernal king known as the Rubeus Pugnator. Under this fearsome demon's rule, Yobial is summoned to help create the Ring of Mars. This destructive talisman is reputed to give a person the power to strike out at enemies and destroy them.
SOURCE:
The Dictionary of Demons written by Michelle Belanger