Artwork from The Legend of Zelda
The Silver Arrow is a recurring type of Arrow in The Legend of Zelda series. It is mainly used to defeat Ganon in the games it has been found in.
The Legend of Zelda
In The Legend of Zelda, Link can obtain the Silver Arrows in the final Dungeon of the game, Death Mountain. It is needed to hurt and defeat Ganon, the final Boss.
A Link to the Past
The Fat Faerie in the Dark Pyramid will give Link the only weapon which is capable of defeating Ganon: the Silver Arrows."
— Nintendo Power Player's Guide
In A Link to the Past, these arrows are also needed to defeat Ganon. Link can upgrade it with the Bow in a fountain in the Pyramid of Power.