Apocalymon

Apocalymon is the main villain in Digimon Adventure. He was created by deceased Digimon during a reconfiguration and he was able to breach through the fire wall. He is very much often an unidentified digemon on a dodecahedron with pyramid like platforms and large claws connected to DNA strand like arms. With such arms he could easily reverse the digievolutin of a digimon while holding onto it. He was in the end destroyed by War Greymon.