User blog comment:Blueyhale/How does the Imperial Webway work?/@comment-26331252-20151013155812/@comment-26260282-20151014195805

The Emperor started to build a path into the Eldar Webway or what is left of it, using the Golden Throne 10'000 years ago, while He still walked among and ruled Mankind. Since the Webway is kind of a sealed of area inside the warp, where no chaotic entity can go, from what I understand The Emperor wanted to make use of it, since it would be much safer to travel that area of the warp, then it is to travel the warp using the technology that is still used. The Golden Throne would allow The Emperor to open a gate into the Webway, but only while He was connected to it. It was His intention to let Magnus take over his place, once a sufficient part of the Webway was "conquered". Unfortunately, He would never finish his project, so we will never know, where He to what end it would have come, conquering the whole Webway, maybe even starting to extend it? But the Golden Throne is a complex device and keeps Him alive for all of Humanity to this day, even though His physical form can no longer move.