((Going on a family trip. Will most likely not have Internet access in the next two days.))
Zechariah looks between Ike and Irine before speaking up. "I guess it's only fair to mention a bit of the Medium as well. A bit of where I came from. Eido went great lengths to explain that, ultimately, he was not a god, or, rather, the God. Even he did not know whether there was a higher power that made him and the other beings that existed with him. He never went too far into detail, but I knew that, out of all of the beings that existed with him, only him and one other being remained. The force that killed the other beings was known to us as the Shadow. In short, Shadows are the "negatives" of everyone's subconscious. Normally, these Shadows aren't malevolent, at least not on a wide scale. But something provoked the Shadows and corrupted them, forming them into a cancer that continues to spread across every realm that exists in Eido's domain. If living beings are not strong enough to confront their own Shadows and help others to do so, then they will inevitably be consumed by the never-ending tide of Shadows.
Since the Shadows are able to span multiple dimensions, Eido created a system that would allow living beings to also connect multiple dimensions. This is known as the Medium. This system connects the physical, mental, spiritual, and temporal aspects of a person's existence, allowing them to project spiritual force as physical power. Technically, anyone can use this system, but there are always ten people who are naturally endowed with a special, natural sense for this connection. Within a single generation, they each represent one major aspect of life. We call them 'Guardians,' as they protect their facets of life against destruction. There is also one additional person - a 'Medium' - who trades direct power for the ability to cross universes, not just dimensions. There were tons of other details about this system, but it would take too long to explain. This was the most recent iteration of the Medium. I have no doubt that Eido changed it too many times to count, as he has been constantly searching for a way to stop the fall of universes to the Shadows.
In my existence, four universes with four generations of Guardians were created. That meant forty-four people in total; by the end, that number had been cut down greatly. We were supposed to be the last ones. If we failed, Eido would simply stop and conserve the rest of his power to prolong the inevitable death of all living things in our multiverse. Eventually, it came down to the last battle, and..." He sighs. "Well, you know what happens from there, at least to me. I destroyed the Medium and the Shadows connected to it, and since practically all of the malevolent Shadows had descend upon the last universe, that meant that it was over. Of course, it cost me my soul - or, at least, that was what I thought. Now it's over. I have no idea if I succeeded or not. I did have one last guarantee in case I failed, but I have no idea if it came down to that."