-Informational Entry-
In regard to the basic setting of Imperium. Supernatural things called “Parareality” is very rare in everyday life in 2385 and before. The events of the Schattenkrieg made all of these things more common.
The Inner Realms have of course existed since the very beginning of everything. Likely before the Big Bang expanded matter into the Fifth Realm. As long as there has been life in the universe, Lebenflus has existed locally.
Magic itself was known to the Falinjorin since they were created. But humans were largely unaware of its existence until after the official first contact.
In modern times, things like Liminal Constructs may have released Ashkions into our reality.
All that aside. With the rise of the Amerdus. They are keenly aware of much of the parareal world. The oldest among them are likely masters of both magic and inter-realm relations. Having made contact with Askions and other entities.