[quote=@Legend Begins]
<Snipped quote by Shadow Dragon>

I believe I can answer your question. Ever Tier Five is selected for both their synergistic prowess and capability as an administrator of Existence. They must be capable without assistance from others and once they join Tier Five, they gain a boost in strength from the System.
[/quote]

What is this System? Is it a physical location, or a being or artifact?