Magic Rod
The Legend of Zelda
In The Legend of Zelda's first quest, the Magical Rod is found in Level 6, Dragon Labyrinth. In the second quest, it is found in Level 8. The Magical Rod shoots a similar beam to a Wizrobe's projectile.
Book of Magic
After gaining the Book of Magic, the Magical Rod's attack leaves a fire effect similar to that of a Red Candle when it makes contact with an enemy or wall, causing more damage. It can be found in Level 8 (Lion Labyrinth) in the first quest, and Level 4 (Snake Labyrinth) in the Second Quest.
Link's Awakening
The Magic Rod is used to expel blasts of magical energy, and it's the main treasure in the final dungeon of Link's Awakening, Turtle Rock. The Magic Rod is vital to defeating the dungeon's boss, Hot Head. If the player exits Eagle Tower after obtaining the Mirror Shield but before defeating the final boss, the Magic Rod is also very effective against this boss, Evil Eagle.
In terms of damage and range, the Magic Rod is easily the most powerful unaided weapon in Link's Awakening, though a Spin Attack charged with a Piece of Power can easily exceed it in terms of raw damage. The Boomerang is also almost equal in strength if not stronger than it.