The method of obtaining the giant blade of the black knight in the prequel of Yuan Qi knight

Challenge the dark knight at the abandoned castle from 6 pm to 8 pm and win.

In the game "Prequel to the Powerful Knight", the giant blade of the Black Knight is a rare weapon dropped by the BOSS Dark Knight. To challenge this BOSS, you have to go to the abandoned castle on the game map, and you have to wait until 6 pm to 8 pm to start the challenge. If you successfully defeat the BOSS, you will have a chance to get a valuable item-the black knight's giant blade.