The mud-burning technique?

Count Rowan was taken aback by the answer.

He had been a metalworker for so many years, yet it was the first time he had heard of the term.

Darryl was amused by Count Rowan's reaction. After that, he explained the process in detail.

Count Rowan was overjoyed. He kept singing praises for the technique. "That's awesome! I'm surprised that Mister Darryl has such a high level of achievements in metalwork."

Then, Count Rowan gave an order to the servant behind him. "Qu