After ensuring that Sika had sent her explanation of the arrangement to Saleen, Nailisi then said, "Sister Sika, I will have to bring along the twelve Notes of Purgatory. What about your safety?"
That was when Sika slapped her forehead. What was she thinking? Nailisi would not be able to bring demons into the teleportation portal without that equipment.
The space within the twelve Notes of Purgatory was not big, so only demons could be brought along. Human soldiers would not be able to resist the darkness of the purgatory. If they were to be sent in, they would turn into idiots after coming out.
Only those with similar grades and abilities as herself would be able to stay in there for long periods of time and even then, one would not feel too comfortable.