Magic Key
For Zelda II The Adventure of Link on the Nintendo Entertainment System (NES).
Official art

From the official guides
A magical key that can open several of the locked doors.
A magic key that can open any number of locked doors.
Since he cannot find any keys in this palace, Link must first get the Magic Key. Search for it in Kasuto. With the Magic Key he can proceed to the Sixth Palace and open up its secrets.
A normal key works only once, but this one works any number of times. It is not in a palace, though...!?
A handy item. With this key you can open as many doors inside the palaces as you like.
A magic key that opens the doors in palaces and can be used any number of times.
What it does
One of the eight treasures. Link keeps it for the rest of the game.
Opens every locked door in the palaces, so Link needs no more keys.
Where it is
Found in New Kasuto.
