Fool's Ore

From Zelda Wiki.org

In Oracle of Seasons, the Fool's Ore was one of five special types of Ore Link found in Subrosia. When the Strange Brothers took Link's Roc's Feather, they gave him the Fool's Ore. After Link got his Roc's Feather back, he placed the Fool's Ore where the Roc's Feather had been.