After contracting with Undine, Ifrit, and Gnome, you are ready to go to Moria.
Buy two Rune Bottles in Alvanista if you can afford them. Stock up on Remedy Bottles as well. Equip Cless/Cress with Gungnir or another non-elemental weapon.
Make sure you have your Moria Pass in the Treasures section of your inventory. If you don't have it, talk to the guy behind the counter in the Adventurer's Guild in Alvanista. The Adventurer's Guild is through the passage to the left of the counter in the Alvanista Pharmacy.
Leave Alvanista to go to the overworld, then go east across the bridge, then go south. When you are past the mountains, go east, then go northeast to find the entrance to the Moria Gallery.
After the guard checks your pass, go to the northwest part of this room to find a chest that contains an Orange Gummy, then go farther west to pull a switch in the wall. Go all the way east to reach the next room, then go through the door and down the stairs.
Step on the rightmost switch to open the door, then go through. Go north and you will see a sign. There is a chest hidden behind the sign. Open it to get Lavender. Then go west to the next room. Pull the statue south and onto the switch. Go south to the southern end of the room to find some chests. From right to left, they contain a Protect Ring, Steak, and 2000 gold. Then pull the lever. Go north and then east to the previous room, then continue going east to reach the next room. Go through the door and go down the stairs.
Go east from the stairs, then go all the way to the north end of the room. Walk over the ON symbol to float. Return to the stairs and go west, but don't step on the off symbol. Go north through the door above. Keep going north until you reach an OFF symbol. Float over it to land. Then go to east, step on the leftmost switch, and go through the door. Follow the path to reach a room with a statue. Pull the statue so that it is not standing on the switch, then go south and through the door. From there, go east and go down the stairs.
Go west until you see a torch that isn't lit. Check on it a couple of times, then pull on the torch to open the path. Go north up the path that opened, and go through the open door. In this room, step on one of the switches and wait for the woman to step on the other, and then open the chest that appears. It contains a Rune Bottle. Exit the room.
Step on the leftmost switch to open the other door. Go through. The sign in this next room says "up up down down left right left right". Go west to the next room, where there are four switches. Walk on the switches in the order that the sign said. If you make a mistake, just start over. If you did it correctly, you will hear a sound. This means that a door has opened in another room. Go east, then go down the first path that leads south, then step on the switch and pull the lever. If you go through the door that you just unlocked, you can optionally go up the stairs to the first floor. This makes it easy to leave the cave and buy supplies or heal up if you need to.
Otherwise, from the save point, go through the door on the right, then go north, then west to return to the room with the four switches. Pull the statue through the door and onto the switch, then go south and down the stairs.
First, go east to reach the next area, then go north until you can't go farther north. From there, go east and step on the switch, then go through the door to the right of the switch. Equip the Sorcerer's Ring on somebody and shoot the switch in the wall. Then leave the room, and go west to the next area. Go slightly south so that you are close to the wall, then go west. Go past the first southward path, then when you see a part of the wall that is lower than the rest, go south through it and down the stairs.
Go through the door on the right. Then go east, over the spikes, to the next room. Go through the open door. Pull down the rightmost statue and pull the lever that was behind it. Go south and open the chest to get a Lemon Gummy, then go back and move the statue back onto the switch. Go to the left side of the room, then keep going south to find the stairs to the next floor.
Use the Sorcerer's Ring to light the unlit torch. Then step on the transporter that appeared. In the dark room, go east and go around the room to reach the chest. You have to go the long way around or you will be transported just before you can reach the chest, which contains a Lemon Gummy. After you open the chest, go south to be transported back to the previous room.
Then step on the transporter again, and go east to go the long way around and reach the chest, which contains a Yellow Cake, then go north to be transported.
Step on the transporter again, and this time go north to go the long way around and reach the chest, which containsa Mystic Broom. Equip Arche with the Mystic Broom right away. Then go east to be transported.
After that, step on the transporter one more time, and you reach a room with candle holders. Light all the candles with the Sorcerer's Ring, then go north through the door that opened.
In this dark room, go north, then east, and follow the path to reach the next room. Break down the wall (this requires the Pick-axe, which you can buy in Alvanista if you don't have one anymore), light the candles with the Sorcerer's Ring, and go south and through the door.
Unequip your Sorcerer's Ring and go up to the candle holder. Check on it to throw the switch. Go north through the door and step on the switch, then go back to the previous room and walk over the ON symbol to float. Go north to the room where you stepped on the switch, and follow the path. When the path splits, go south to find a chest that contains a Yellow Cake. Then go north, then east, and follow the path to the next room. Go south to find chests. From left to right, they contain a Rune Bottle and an Apple Gummy/Apple Gel/Apple Gummi. Go north up the stairs, then go as far west as you can go, then go south and east to find a door. Go through.
Go east, over the holes in the ground, then go north. Step on the switch and go through the door. Go west and pull the lever. Now you can optionally go straight up to floor 1. You can leave Moria to buy supplies and heal up if you wish.
Go east, then north to the next room. Then go east and follow the path to a room with a floor switch. Step on the switch, then go back to the room with the dripping water on the left. Equip your Jet Boots, stand under the dripping water, and after it drips on your head, run east and south, then run past the flames. Go north through the door, then go down the stairs.
Pull the switches on the wall and open the chest to get the Turquoise Ring. Step on the transporter on the right, then go north and read the obelisk. When you are done, step on the transporter, then use the left transporter. With Klarth/Claus, go north and walk up to the platform, and summon Ifrit, go south and summon Gnome, go east and summon the Sylphs, and go west and summon Undine. When you hear the voice, go back to the transporter and step on it.
You are about to fight a boss. In the room with the two transporters, you won't be attacked, so fill your food sack and walk around until you are healed up. Or you can leave Moria to heal up and buy supplies.
For the upcoming battle, set Cless/Cress to use Tiger Teeth and Mecha Blade if he knows them. Psion Bolt has no effect on Maxwell. Turn off Klarth/Claus's spirits except Undine, and turn off Arche's spells except Thunder Blade. Mint's tactic should be Value HP over TP, but you should also use Gummies to supplement her healing. Arche and Klarth/Claus's tactics should be to Cast Many Spells and Call Many Spirits.
When you are ready to fight, step on the transporter on the right, then go north to the obelisk.
Maxwell uses a powerful Molecular Attack. You might need to use Gummies to supplement Mint's healing. Cless/Cress can't hurt Maxwell during a Molecular Attack, but Klarth/Claus and Arche's spells will stop that attack and make him vulnerable to Cless/Cress's attacks again.
Moria Treasure Room
Go north to reach the treasure room. Go north and you will automatically open the top left three chests. After that, open the rest of the chests. From top to bottom, left to right, they contain a ?Rod that becomes a Rune Rod, which you should equip on Mint now; a Rune Bottle; 6000 gold; an Hourglass; Elixir; Black Onyx; Verbena; ?Armor that becomes Mithril Mesh, and another ?Armor that becomes Mithril Mesh. Equip one of the Mithril Meshes on Cless/Cress and equip the other on whichever character has the lowest defense.
Go back the way you came until you reach the room with the flames. Pull the lever to the left of the flames, then run east past where they were. Then go north and west, and go north through the door. Go up the stairs and keep going up until you reach the first floor. Then go southeast to exit the Moria Gallery.
You should now go back to Alvanista castle and speak to Runeglom/Lundgrom in the Magical Research Room. Then stock up on supplies in Alvanista. When you are ready, leave Alvanista and go west across the bridge, then keep going west to reach Edward's house.