How can you get a cursed tool in harvest moon back to nature?

Answer 1

The only cursed tool I know of is this:

In Fall(Year 1 or 2) on any day up to the 27th, Gray may come to your farm as you walk outside. He will be mad and ask to use your Mill to make a hammer. Let him do so and you will raise your friendship. He will weed your field also in return. After a few days he'll ask you to try the hammer, it'll break. Mary sees this, then go to Village Square to see Mary and Gray fight. Gray will later thank you.