Magical Key

The Magical Key is an item that appears in The Legend of Zelda and in The Adventure of Link.

Location and Uses
The Magical Key allows the user to unlock any Locked Door. Unlike a normal Key, it is reusable, meaning that regular keys are rendered useless for the rest of the game it is found. In The Legend of Zelda, the key count is replaced with the letter A to show this.

In The Legend of Zelda, it can be located in the eighth Labyrinth; in The Adventure of Link, it is found in Hidden Kasuto (Link has first to learn Spell in order to unveil the whereabouts of the Key). In the first game, the key is golden, and it has a bow shaped like the head of a lion. In the second, it's also gold-colored, but the lead shape resembles more a coat of arms.