Colloquial Terms: The Quiet, The Unmaking, The Silent Void, The Screaming Darkness, The Starless Night, Rest, The All-Consuming Void, ENDING
Physical Description: PRE19 is defined by the complete absence of physical description
Behavioral Characteristics: It is believed that PRE19 came into existence in an alternate reality, as a result of that universe being torn in some way. PRE19 is nothingness. It is a void defined as the opposite of existence, which spreads across universes and consumes them. While it does pass from reality to reality, some "tendrils" of it can be sighted in different universes, erasing various things from existence.
Further Reading: This post from the blog "brighter than a spoon" as well as this blog.