About Zelda II: The Adventure of Link

There is an extremely obscure bug in the game whereby the attack value which normally maxes out at 8 can be set to something else. "0" and "F" have been seen. Both of these, with two exceptions, will allow Link to kill any enemy with one hit. The exceptions are the Thunderbird boss which requires one hit but the thunder spell must still be cast on it first. Shadow Link still requires 8 hits. No one has discovered what triggers this bug. It can be saved and in fact cannot be undone from a saved game.