A classic depiction of heaven and hell, with the earth in between, Amon thought. In his past world, the first and the third groups were usually illustrated with angels and demons, respectively. He didn't hear any mention of angels in this world. So, he assumed this was an illustration of Gods and Demons, with the common folks in between.
He didn't pay the mural too much attention. It only showed that this ruin used to be a religious place. This hall could be where the followers came to have their communion.
After making his rounds, Amon spotted two other exits from this hall. One was with a door that was half broken. He could slip through the broken part and into a corridor. The corridor, however, didn't take him far. There was another cave-in, and the path ahead was blocked.
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