Creator: ???
First Use: SCP-XXXX
Definition: Item is uncontainable and actively causing the end of the world.
Description: Appolyon is used for objects that are currently unconfined and will inevitably lift the Veil. Usually, XK-Class or other apocalyptic scenarios are the most common usage, but if an object will inevitably reveal the anomalous to the world, or cause a noticeable anomalous effect across the globe, then it is Apollyon. Keep in mind that just because something /has/ revealed the anomalous to the world at large, that doesn't make it Apollyon. Only if it destined to generate a widespread, noticeable anomalous effect to humanity is it Apollyon. Many other anomalies, while they may lift the Veil, could have been prevented from doing so.
Alternate Object Class: Keter