It didn't take long for the whole group to understand just why it was so difficult to cross dimensions.
The energy consumption was quite high yes, but it wasn't something they couldn't handle. After all, their cells could produce Astral Energy of their own, so for the most part, the energy wasn't too big of an issue.
What was an issue though, was the absurd amounts of concentration they needed to keep the reality bridge steady.
After all, the void eroded all forms of matter, concepts, and aspects of reality that were within it. Not to mention that reality had its special structure that kept it stable.
Not only was this structure becoming unstable due to the shape they were making it take, but the void constantly tried to erode it which made it even more unstable.
Kosmo and Amy had a bit of an easier time since they understood the thread theory and thus had a better time keeping the structure stable. But the same couldn't be said for the others.