Final Fantasy V/Fire Lithograph

Submarine
The ariship hangar is visible again so dock there. Enter and go down two levels to find Cid trapped in some machinery. You rescue him and he and Mid start to work installing some new technology in your airship. When it's nearly done, Mid find Krile waiting on deck and they talk about Cid blaming himself for the loss of the crystals. Cid appears and announces that the work is done. In saying farewell, Cid says that, seeing as he can't fight himself, he's glad he could help the effort with his inventions.

When the airship is on the ocean surface, press the confirm button and then select up or down to either take off or go under water. There are four points of interest marked on the undersea world map. One is a shortcut to Moore Village, so there is nothing new there. Two others lead to the remaining two lithographs and the final one leads to the, now sunken, Walz Tower. Apparently, these can be explored in any order, so we'll start with the one leading to the Fire lithograph.

Great Sea Trench
Pilot the airship to the eastern edge of the worldmap, submerge, and head for the point marked northeast of Crescent. There is a crack in the ocean floor there; when you're above it the sub docks itself. Exit the sub to an undersea cavern. Defeat the Gargoyles as with with previous lithographs. A page from the book burns and the door is opened as before. Go in to B. 2 Floor. The monsters here are undead and there is lava around, so it's a good idea to have a Geomancer and a Bard in your party.

Follow the passage east, then south and down the stair to B. 3 Floor which has a save point. Continue to B. 4 Floor. Press the button to open a passage and follow the ledges east. There is another button here, but this actually closes the passage forward. If you press it then you're forced to either walk through the lava or go back to the previous room to reset the buttons. There will be plenty of lava you can't avoid up ahead so there's not much point in avoiding now though. Go north to the next section.

There are five buttons here arranged in a row of two to the north, and a row of three to the south. Four of these open trapdoors which land you on the next floor down, possibly in a lava pit. The one on the right in the north row opens a bridge which leads to treasure. Exit southeast or press one of the other buttons to get to B. 5 Floor.

Go around the lava pits, grab the treasure, and exit east to B. 6 Floor. There are ledges here but the floor is mostly lava. Get the treasure and exit east to B. 7 Floor.

This floor is actually a tiny village, the home of the dwarves. They say "Tally-ho!" a lot and even end their sentences with "tally". There is a save point in the center and a shop to the north, though nothing new in the inventory. There are actually two shops in one; speak the dwarf from the north or south to see armor, and from the east or west to see weapons. There as a long passage south and west and if you talk to the dwarf at the end he says there's something interesting above and you get a peek at the worldmap. This is a hint to find Mirage Village in case you haven't yet. Exit south to a pool of white water. You can refresh your Magic Lamp here if you have one; go to the nook in the southeast corner and a blue flash will let you know that the lamp is renewed. Go up the waterfall to the northeast to exit to the next area.

This section is almost completely filled with lava. The first chest only backfires on you, shoving you back into the lava. Press the button in the northeast corner to open a door to a small room with treasure. To open the way forward, press the remaining switches to the south, then open the first chest; this time it opens the doorway to the next area instead of backfiring. Go up the stairs to a new area in B. 7 Floor.

Check the lithograph and a battle begins.

When the battle is over you see something written on the lithograph; you get the Time spell Meteo. Use Telepo to exit the dungeon.