The Fall of the Ealdremen Galaxy (event)
The Fall of the Ealdremen Galaxy is the term that the survivors of the Fourth Galactic War use to refer to the rise of Rotus and his subsequent apocalyptic alterations to the Ealdremen Galaxy. As of now, it has only happened in the first dream of Arplakoon, though the results of it have been witnessed by denizens of Arplakoon's second dream.
Lead-up to the Fall
The Fourth Galactic War is, according to Varthenral, what allows Rotus to ascend to power and accomplish his goals so easily. Because the galaxy is too weakened and divided during and after the war to even notice him, Rotus' power goes unchallenged, and he is able to somehow warp the face of the Ealdremen Galaxy.
In the first dream of Arplakoon, the Fall of the Ealdremen Galaxy occurs immediately when the Fourth Galactic War ends.
After the Fall
In the second dream of Arplakoon, Varthenral used the power of Ganrikkat to show several of the player characters an area in Tumoria after the Fall. Everything was overtaken by nature, and "cloaked ones" that the player characters suspected to either be protogods or colossi roamed around, their power unchecked. According to Varthenral, the cloaked ones hunt Kylians (which the cloaked ones referred to as "Garlets").