The Legend of Zelda: Ocarina of Time
Although Link defeats the most of the monsters inside, he is too late to save the tree. Before the Great Deku Tree dies, he gives Link the Kokiri Emerald, a magic stone, and tells him that it was a man in black armor who put the curse on him. He also tells Link that he needs to go to princess of Hyrule at Hyrule Castle. Before he leaves, Saria, Link's friend, gives him the Fairy Ocarina, a magic instrument.