Magical Sword

For The Legend of Zelda on the Nintendo Entertainment System (NES).

From the manual

Link's main weapon. When his LIFE is full, it fires a beam that reaches far-off enemies. There are three swords, each with a different attack power.

Translated from the Japanese manual.

Item

Kind	Swords
Japanese name	マジカルソード (101Leafy's translation)
Attack power	4 (the Wooden Sword is 1)

Official art

From the official guides

Link does not possess any weapons at the beginning. In order to attack enemies you must obtain a weapon. If you use your sword you can cause damage to almost all of your enemies. There are three kinds of swords: the regular sword, the white sword and the magical sword. The white sword has twice the power of the regular sword. The magical sword, the most powerful sword of all, is four times as powerful as the regular sword. You can obtain the regular sword rather easily but the white and magical swords are difficult to obtain.

The Legend of Zelda Tips and Tactics (Tokuma Shoten Publishing for Nintendo of America, 1987), p. 8

It is the most powerful sword. You can't get it unless you have 12 Heart Containers.

The Legend of Zelda (Nintendo Power) (Nintendo of America, 1988), p. 35

The strongest sword. When you have 12 or more hearts, the old man hiding under a grave at B-3 gives it to you.

ゼルダの伝説 (二見書房, 1986), p. 77, 101Leafy's translation

The strongest of all the swords by far. The old man who lives in the graveyard gives it to you. Go through the Lost Woods!

ゼルダの伝説必勝攻略ガイド (新星出版社, 1986), p. 10, 101Leafy's translation

Twice as strong as the White Sword. It is not easy to get.

ファミリーコンピュータ攻略ガイドブック1 ゼルダの伝説 (曙出版, 1986), p. 14, 101Leafy's translation

Besides the sword Link gets at the START point, there is the White Sword, given once he has 5 Heart Containers, and the Magical Sword, at 12. They raise his attack power to two times and four times the original.

ファミリーコンピュータ必勝シリーズ1 ゼルダの伝説 (ミリオン出版, 1986), p. 5, 101Leafy's translation

The strongest sword. Twice the White Sword, which makes it four times as strong as the first sword. Cut your way through the enemies with it!

ファミコンマル勝DXシリーズ1 ゼルダの伝説 (角川書店, 1986), p. 56, 101Leafy's translation

The Magical Sword. It has twice the attack power of the White Sword.

ゼルダの伝説 (秋田書店, 1986), p. 15, 101Leafy's translation

Twice as strong again as the White Sword, which makes it four times the normal sword. Without it, the strong foes who guard Ganon are a bit of a struggle.

ゼルダの伝説 (双葉社, 1986), p. 10, 101Leafy's translation

Four times as strong as the first sword and twice as strong as the White Sword. But you can't handle it without 12 Hearts of stamina. Go before that and you won't get it.

ゼルダブック (ファミコン必勝本 1986年6月号付録) (JICC出版局, 1986), p. 76, 101Leafy's translation