Sam and the team, all took the disguise serum he prepared. Their appearances changed and they went into an Elder level world through its portal.
Out of all the worlds and realms in this conquest, the elder level realms are the least active. Even if the elders went into these realms, they didn't do the open conquests like the students did. One of the reasons, they are less in number.
The other reason is that instead of killing these people, they want to slowly befriend them and then take over them.
Even the transcendent level cultivators are dime a dozen when considering the scale of the realms. But the Divine plane consummation cultivators are hard to find. Of course, they might seem common place with their number in the academy realm.
But compared to the number of students, it is almost a one to one hundred ratio. That too considering the number of talented people in the academy realm.
