Thunder Spell

The Thunder Spell is one of the most important spells learned in Zelda II: The Adventure of Link. It is the only way cause Thunderbird's face to appear, which is its weak spot. The Thunder Spell is also a very powerful spell in general, as it destroys all non-boss monsters on the screen. The only drawback is that it is a very expensive spell to cast.

Link learns this spell from the old man in Old Kasuto Town.