It is said that if one spends too long looking through telescopes and ultra wormholes, and peers too closely at a certain undiscovered planet, they shall go mad before their head suddenly explodes. Some have taken this legend to be a garbled account of Blacephalon, whose appearance and behavior defy both earthly and galactic standards, and whose main weapon is indeed a head which explodes without warning. But while it's indeed an account of Blacephalon, it is a surprisingly accurate one – for perhaps the most terrifying thing about this Ultra Beast is indeed its contagious insanity.

Many wonder what secret of the universe would lead one to shroud one's face in blue and red lights and display rapid-fire, grammatically correct but nonsensical messages in the light-based script of the Elgyem, interspersed with eruptions of the text. Yet if some words are being conveyed by the Blacephalon, generations of the finest minds of the galaxy have proven unable to comprehend them. One particularly notorious group forced a cluster of stars to go nova in the red, blue, and yellow colors of Blacephalon – perhaps to communicate with them, or perhaps, like some mad missionaries, to spread their message throughout the galaxy.

Surprisingly, the brief appearance of Blacephalon on Earth has led neither to overcrowded mental hospitals nor large numbers of bodies found headless and surrounded by debris. For some, this gives credence to the skeptical views of a certain Elgyem philosopher, who accepted the reality of exploded heads but attributed the other events around Blacephalon to a sort of mass psychosis. Yet others have noted the human custom of fireworks, which originated at precisely the moment in history when the light of the Blacephalon Novas reached Earth; only humans, many fume, could turn the horror of the Blacephalon into entertainment for festivals!