The ritual to request the divine fragment from the Ocean of Blood is a simple ritual and not as valuable as the information of the feat needed to impress it. So they didn't need to provide highly valuable information to earn it from the white tower.
The information they gave away was that the god of dreams was pursuing the authority of the pathway of telepathy. This information was more valuable than the ritual that they asked for, so they were able to gain more information with it.
The angel of knowledge that attended to them asked them to request something else that they wanted to know. Legion asked to know what the weakness of the gods was.
The angel of knowledge smiled at them and said, "It seems you don't know for sure if your guess was right or not."
She wasn't the one who attended to them before, but she has access to the collective knowledge of the pathway of knowledge, so she knows exactly what transpired the last time that Legion(4 was at the tower of knowledge.
