A Sense of Pressure!
Noah's main body continued moving as the cores and the skill books that he placed in the Expansive Space were then quickly accessed by his clone and transferred into Spiritual World for his subordinates to use right away.
The ones prioritized were the Harbingers of Sin, as well as beings like Elena. The domain expansion rank cores and skill books would be even more useful to them as they didn't have the ability to very rapidly max proficiencies of their skill trees and upgrade them as quickly as Noah could. So even with the rapid power leveling that he continued to do with them, their skill trees almost always lacked behind their ranks because of how fast they rose.