Resonance (AOS)

In contrast to the Great Curse, Abyssals suffer from Resonance. Abyssals are slaves of the Neverborn, they must obey them. The Neverborn are cruel and vicious creatures who abhor all life, and consequently demand their followers to do the same. Whenever an Abyssal commits a sin against the bidding of his Neverborn patron, he gains a measure of resonance. This resonance can vent in spectacular outburst that can turn entire areas into swaths of shadowland or these outbursts can manifest as ghostly appearances or even crippling effects that target the Abyssal himself

Copied from Abyssal_Exalted