Tsunade felt like her world was turned on its head. That Maester Cord was a True Lord was acceptable as the rise of such a being had been the hope of all beast races with the Law Bindings combating the Corruption.
Yet, not a single one had arisen in over a million years. Even in the worst times of history, at least one could be born as if Heaven and Earth would not allow the beasts to fall into extinction.
Now, she realized that the being in front of her had somehow risen to their layer after a million years of being trapped inside it!
The reason she knew he did not come from above was the fact a Radiant would have sent a well supported envoy or at least the ability to widen any breach of whatever isolated the layers since the Corruption arose.
Also, the Shandor Syndicate had branches in the 3rd layer.