Tunguska Event

One of the most destructive portions of the Grand Reveal, the Tunguska Event (also known as the Tunguska Summoning) is the most apparent example of a Demon being summoned without a contract.

Summoned by a bored son of a hunter in the Tunguska region of Siberia, in Russia, as far as we can tell, the demon in question literally exploded onto the scene. It's arrival flattened trees for miles in a colossal blast.

Russia, luckily, is sparsely populated in places, and it took some time before the demon reached a major population center. Not so lucky, the city was totally unprepared for the monster of glass knives crashed through the city. It had burned itself out by the time it had raised the city, but the survivors of the massacre could be counted on two hands.