Zelda 1 - Solution du donjon 7 de la quête 1 : Le Démon (Zelda I Nes mini)
Plan du palais "Le Démon" : donjon 7 de la quête 1 de Zelda I (The legend Of Zelda Nes mini)

First, the map. This dungeon has many bombs and Goriyas. There are many holes to blast but if you study the map carefully you should have no trouble.

Go right and go up. Blast a hole at the top, kill the Stalfos holding the compass and go back down. Go all the way right and take the key from a Stalfos (1). Go all the way back left (just above the start). Blast a hole to the left (2) and go down to pick up a key. Go up 3 times to buy 4 extra bombs. Go back down, go right and go up twice. No need to kill Digdogger — instead blast a hole to the right, kill the fire caterpillars to get a key (3).

Zelda 1 - Solution du donjon 7 de la quête 1 : Le Démon (Zelda I Nes mini)

Go left twice and go up. Give the bait to the Goriya (1) and go up. Take the map and blast a hole at the top. Blast a hole to the right and kill all the monsters in the room to go right. Take the key, kill the enemies, go back left and go down to B2. Blast a hole in the right wall, kill all the enemies and push the left block to go get the red candle. Blast another hole to the right and take the right door. Beat Digdogger (2) with your whistle, boomerang and sword and go up. Blast a hole to the right, kill all the hands and push the middle block to the right to take the staircase. Blast one more hole to the right to reach the boss.

The boss is Aquamentus again, barely stronger than the first time. If you have all your life points, stand far away and throw your sword at his head. Otherwise, fight up close — 2 hits from the magic sword on the head will do. Aquamentus opens his mouth to spit fireballs which you can block with your magic shield.