Angel of Death also known as 'AOD', will make a flying dragon appear out of nowhere that will eat enemy followers and the shaman. If the dragon tries to eat somebody inside a hut, the hut will be destroyed as the follower is being snatched. Usually is stopped by using Ghost Army.
The Angel of Death can be destroyed by firestorm or another Angel of Death. It can also be destroyed by 4 direct lightning stikes or if a large number of firewarriors attack it at once. If it doesn't get destroyed, it usually goes away in 3 - 5 minutes. It is possible for a good part of the tribe to be decimated with a good Angel of Death.