The book retrieved in Great Builder's Pyramid was the first part of his inheritance. It described two topics. The first one involved the oval items that acted as centers of power. The second explained the workshop and its functioning.
For "workshop", Great Builder indicated the ability to create items with other items. Noah had seen an example of that skill. The fly-like puppets had built the feathered creature right in front of his eyes.
That technique allowed a cultivator to automate a process so that other spells, arts, or puppets could perform it. In Great Builder's case, the whole Pyramid was a workshop divided into multiple areas that could complete different tasks.
The workshop didn't initially interest Noah. He didn't intend to build a home and settle. He wanted to roam freely and explore the Immortal Lands, so a massive structure would only slow him down.