Abaddon

Abaddon, or Apollyon in Greek, is mentioned in the Old Testament and the Book of Revelation as the name of the angel of the bottomless pit and sometimes the name of the pit itself (Rev.9.11). The name Abaddon is derived from the Hebrew word for "destruction," while Apollyon is the Greek equivalent, meaning "destroyer." In the vision of the fifth trumpet, a star falls from heaven and is given the key to the bottomless pit. When the pit is opened, locusts with the power to torment people come out, led by the angel Abaddon or Apollyon. This angel is described as the king over the locusts, which are sent as a judgment upon the earth. The identity of this angel is not explicitly stated, but some interpret it as a reference to Satan or a high-ranking demon associated with destruction.