Star Island
From Zelda Wiki.org
Star island is an island shaped like a star, but you probably could have found that out by yourself. There is a giant, lonesome boulder on one side of the island, blow it up to gain access to a secret cave. if you blow up the wrong stone miniblins will show up and folow you until you leave the island or go into the secret cave. Down here you will meet a bunch of Magtails, Bokoblins, and Moblins, defeat all of them and you will receive a Heart Piece.

