The Hidden Requirement!
Noah knew the psychology of extremely powerful beings that had lived for a long, long time.
The longer they lived, the more experiences they accumulated as they learned of the nature of Reality and understood many things!
Because of their vast breadth of knowledge though…many of them committed critical mistakes when it came to him.
They placed him on the same stage as their past experiences and knowledge when it came to their opinion of him.
They compared him to other Geniuses they had seen across the eons or examples of other beings similar to him!
Noah had no doubt that none of the Ancestral Descendants had ever expected a native of the Barren Lands who had never even stepped out would be capable of killing them.
And this was entirely true to an extent as logically, nobody had suddenly been capable of erupting with power and forming multiple Boundaries or achieving a high Boundary Layer in the Ages Past!