Three-pound hammer

Tianxuan God of War Hersz Source:
However, Master Gu did not dare to disobey what Lord Sword said, so he had to do as he was told.
When I came to the casting table, I saw a piece of black metal about four feet long and one foot wide.
"This is the rough draft of the Youlan Sword. I have been working on it for more than a month, but it still hasn't even taken shape."
Gu Ye sighed.
Hersz used the three-jin hammer to gently tap the black metal and said something that almost made Gu...