Cultivation Platforms
Soon after Elder Song and the elders of the sect came to a decision, the entire sect swung into motion to construct the cultivation rooms for those trying to breakthrough to the Nascent Soul Realm or Domain Lord Realm as fast as possible, while Elder Song personally went to the Iron Sky Kingdom to ask for Yi Min's help in the construction of the formations that would ensure the cultivation rooms wouldn't be destroyed whenever someone broke through to the Domain Lord Realm inside of them.
Although the sect's formation masters had grown a lot stronger over the past few years, they were still nowhere near strong enough to create a formation capable of contain the outburst of power from when someone broke through to the Domain Lord Realm. Not to mention, the expansion of the domain was a crucial part of breaking through to the Domain Lord Realm, so it couldn't be fully restrained and had to be managed properly.