Sea & Fortress

Chapter 5 checklist

Comfort level: Sea Shrine ~Lv 24–28; Flying Fortress ~Lv 28–32+.

• Visit Gaia; buy late-game gear/spells as affordable
• Fairy / bottle side path for mermaids if required by PR quest order
• Onrac: obtain Oxyale; dive the Sea Shrine
• Full Sea Shrine loot; defeat Kraken; Water Crystal lit
• Unne translates slab; obtain Chime / access to Lufenia secrets
• Lufenia town: learn Warp/Exit lore; shop
• Mirage Tower full clear → Flying Fortress full clear
• Defeat Tiamat; Wind Crystal lit — all four Crystals active

Gaia — northeast highlands

1. Airship to the forested / mountainous town of Gaia.
2. Shops sell some of the best pre-endgame equipment and high spell tiers. Buy what your classes can equip after Class Change.
3. Talk to NPCs about the mermaids, the robot, and the tower in the sky.
4. If the fairy-in-a-bottle side content appears in your quest log, resolve it to progress mermaid trust / Oxyale path as the game directs.

Onrac & Oxyale

1. Land near Onrac on the western sea.
2. Waterfall / mermaid sequences: follow NPCs underwater once you have Oxyale (breathing water).
3. Oxyale is mandatory to enter the Sea Shrine (Sunken Shrine) properly.
4. Stock Thunder magic, Protect, and raw healing before the dive.

Sea Shrine — Kraken

1. Enter the Sunken Shrine. It is large: upper mermaid floors and lower monster floors.
2. Explore both directions. Chests include powerful weapons and armor — clear both wings.
3. Mermaid NPCs give lore and sometimes items; talk to all.
4. Reach the Water Crystal chamber.

Boss: Kraken

• Element: Water Fiend.
• Weak to: Thunder / Lightning every caster turn.
• Threat: Brutal physical hits. Keep Protect up; consider putting Knights in front and Wizards fully topped off.
• After: Water Crystal lit. Surface; restock.

Dr. Unne, Rosetta, Lufenia

1. Retrieve the Rosetta Stone / slab from the Sea Shrine if you have not (chest or story handoff in the shrine).
2. Visit Dr. Unne (Melmond area scholar) to translate Lufenian.
3. With translation, the town of Lufenia becomes understandable. Fly there; talk to everyone.
4. Obtain the Chime (or equivalent) that opens the way into the Mirage Tower / sky fortress path.
5. Lufenia shops: late spells and gear. Buy Warp/Exit utilities if missing.

Mirage Tower & Flying Fortress — Tiamat

1. Enter Mirage Tower in the desert. Climb; loot; defeat guardians.
2. At the top, transition into the Flying Fortress (Floating Castle) — multi-floor sci-fi dungeon.
3. Loot every floor. This is where many of the game’s best pre-Chaos items live.
4. Prepare a full heal before Tiamat’s floor.

Boss: Tiamat

• Element: Wind / Air Fiend; heavy resistances to single elements.
• Plan: Do not lean on one element. Use Flare if learned, Haste + Temper/Saber physicals, Nul spells as needed.
• Threat: Strong multi-target breath / magic. Keep White Wizard on full heal duty.
• After: Wind Crystal lit. All four Crystals are restored — the Temple of Fiends in the present becomes the gateway to the past (Chapter 6).