From the entrance, continue to the next screen. From that split, continue left again to find another split. Take the NW path to reach a dead end with a ?Armor (Dwarven Boots).
Return to the previous screen, head south. Follow the tunnel to the right, pick up a Rune Metal from the mineral ore. Continue to the right.
Head right again to the next screen. Gather an Orichalcum from the ore. Further to the right is a dead end with two chests containing Aquaberries and Dwarven Helm. Backtrack to the previous screen and take the path north this time.
Follow this path to the northeast and exit to the next screen. In that split, head to the left and gather the Rune Metal and ?Mineral from the ores. The path to the upper left just loops back to the entrance so go to the right this time.
On this screen, mine the Rune Metal and ?Mineral from the ores by the split path then head north to find a dead end with two chests containing a Resurrection Elixir and Ankh Shield. Backtrack to the split then head east this time. Pick up another ?Mineral along the way. Exit to the next screen.
On the following screen, you’ll find another mine entrance. Ignore that then head north first to reach a dead end with a Steel Helmet from the chest. Backtrack then enter the other mine entrance you saw earlier.
You’ll now in a different area of the mine. In this long corridor, head north first to find a split. Head to the left to find two chests. Get the Steel Armor and Mind Bomb from it. Return to the split then go to the right this time. You’ll find two more chests. Loot the ?Item and Silver Greaves from it. Backtrack to the previous screen.
Continue south this time. In the next screen continue south again then pick up the Dwarven Guard from the chest along the way. Continue heading east (the other path to the north just loops back to the same path)
In the following screen, you’ll find another split. Head two screens to the north to find a dead end with two chests. Loot the ?Armor and Blueberries from it. Backtrack to the split then continue heading to the right this time.
There’s a savepoint in this section. After saving your game, go to the next screen and approach the boss awaiting at the end.
After the battle, loot the Cinderella Glass, Emerald Ring, Dwarven Sword, and Astral Sword from the chests. You can now exit the mine.