The King's Sword in "Dragon Quest 3: HD-2D Remastered Edition" needs to be repaired before it can be used. If you want to repair the King's Sword, you can first get Oriha Steel and broken blades. and a forging hammer. With these three items, return to Cole's blacksmith and resume his lost passion - forging.
How to repair the Sword of Kings in Dragon Quest 3 Remake
With Oriha Steel, Broken Blade, and Forging Hammer in hand, return to Cole's blacksmith to resume his lost passion - forging. After seeing the hammer, he asks for some way of repaying you, and repairing the King's Sword is what he's willing to do for you in return.
After a brief cutscene, the Blacksmith will repair the King's Sword to its strongest condition and give it to you for free, as a thank you for your efforts in restoring the pride in his life. The King's Sword is undoubtedly the most powerful weapon in the game. It can also be used as a prop in battle to summon powerful shock waves. There was no way Zoma could resist it.
The setting that the blacksmith refuses to sell you the Sword of Kings is actually a tribute to the original "Dragon Quest 3". In the original game, you would sell him the Oliha Steel, and he would then sell it to you. The King's Sword is sold back to you. This time he becomes generous because of the extra effort you put in this time.