The Balrow family had managed the Pyramid for millennia and had mapped most of its insides. It had also studied many of its defenses and sealed areas that no one had ever entered.
That knowledge had a price. Every cultivator could purchase it before entering the Pyramid, and Noah didn't hesitate to use his Soul Stones. The Balrow family even gave him a discount after they investigated the reason behind his green card.
The Pyramid had six layers connected in a messy array of corridors and secret passages. They had different difficulties, and Noah's cultivation level allowed him to be safe only on the lowest one.
The first layer was at the base of the Pyramid and featured defenses meant for rank 7 cultivators in the gaseous stage. The sixth was at its summits, and it could contain protections that even experts near the peak of the eighth rank couldn't cross.