Stage One

Since they started *bidding* Robin has been watching around silently with a slight smile on his face, not saying anything, nor stopping them...

And he remained in this state until the owners of private rooms also began to bid, and soon the last price was said for 2.8 million gold coins for the first stage of the Minor Heavenly Law Cultivation Technique!

And the auction did not stop at this point, but there were no indications that it would stop before reaching at least 4 million gold coins.

Even Robin was dumbfounded under that smile, first stage  Minor Heavenly Law Cultivation Technique can take its user to the knighthood realm, but that's it 

these people who are racing to empty their pockets to buy it are all high-level nobles and they all have other Minor Heavenly Law Cultivation Techniques that have reached the second stage