Elric had quite a long discussion together with Kahayag. They talked about different topics mainly focused on the nature of the Shadows, how they moved, their world's environment, their purposes and so on.
And throughout their discussion, Elric listened intently to every word that grandma Kahayag said. He knew how important this information is considering that he is learning not just to win an exam but to come out alive from that enigmatic realm!
He made sure not just to know them but understand deeply and apply them when the times comes that he finally has to step foot into their own domain.
It was already close to nine in the evening when Elric was finally satisfied after bombarding Kahayag with questions after questions which she patiently answered.
After all, the realm of Darkness was full of mystery that even the World Knowledge he got was not enough to expose the deeper secrets of their terrifying existence.