{Portal} finally lifted this restriction but required two doorways to connect the origin and destination. {Blink} was merely the combat application of {Portal} that simplified {Portal} to a single act. While {Portal} allowed us to do great things it much like the rest of my {Fates} had limitations. Apart from the doorway closing if I passed it, its other major issue was the size of the door itself.
Even when I overdrafted, I could not get them to surpass 10,000 ft. That, while impressive was no were near enough what we needed. The body of the average Tunneling Worm was over 3 miles or over 15,000 ft. No amount of soul would allow the {Portals} to go beyond their limit. Thus, even if I managed to get them to dive into the door, they wouldn't fit.