Belphemon Rage Mode is a Demon Lord Digimon. It is one of the "Seven Great Demon Lords", representing Mars and the sin of Sloth. It is said that Belphemon Sleep Mode awakens from its eternal slumber once in a thousand years. When it awakens, it regains its natural shape and changes into an incarnation of rage, and anything that enters its field of vision becomes a target for destruction. It is said that just by suffering Belphemon Rage Mode's roar, Ultimate Digimon and below will have their data disintegrated and will instantly die, and not even Mega Digimon can escape unharmed.
- Lampranthus: Casts black flames from the chains coiled around its body.
- Gift of Darkness: Unleashes a slash attack from its claws, which are clad in the flames of hell.
- Dark Horn
- Lightning Horn
Belphemon Rage Mode is derived from the mythological Belphegor.
- Belphemon: Rage Mode (ベルフェモン：レイジモード)
Official romanization given by the Digimon Reference Book and used in the franchise.