"The howls of death that follow the inescapable tremors of the blue flames."
The Shrieking Terror is the widespread folk designation for the phenomenon that happens to anyone who learns too many Scorching Truths. It is strictly the primordial entity that Institutes refer to as the Exogenesis Threat, bearing the forbidden true name Eirenesis Anakriach (referred to in scholarly texts solely by the cipher RHKH)
The term "Shrieking Terror" functions dually in Arcanoria, as it is both the colloquial title of the demon itself, and the clinical designation for the hyper-specific, paralyzing psychological dread that victims experience the moment they become its next target. The Shrieking Terror is the echolocation howl when the Eirenesis Anakriach acquires a target, the feeling is forced acoustic synchronization with the demon's own shattered reality, locking through the acoustics to carve Resonance Anchors on the victim's Consciousness, locking onto them for the hunt.