H1: Crescent Lake and Mount Gulg
Chapter stats: 37 Chests | 18 New Enemies | 1 Boss
Sail south from Melmond and follow the coast to Crescent Lake on the southern continent. The Circle of Sages there will send you to Mount Gulg, the active volcano where the Fire Fiend Marilith waits. Your goal is to descend five floors of lava and defeat Marilith to restore the Fire Crystal.
H2: Crescent Lake Town
Crescent Lake's magic shop sells Level 6 spells -- the most powerful available at this stage.
Magic to buy in Crescent Lake:
- White Magic: Protera -- raises party defense. Stack this before Marilith to reduce her damage significantly
- White Magic: Invisira -- lowers all enemies' hit rate. Pairs with Protera to make Marilith's six attacks per turn survivable
- Black Magic: Thundaga -- powerful thunder damage, best saved for the Sunken Shrine chapter where it hits most enemies hard
- White Magic: Stona -- cures stone status on one party member. A cleaner solution than carrying stacks of Gold Needles
Protera and Invisira are the mandatory buys before heading to Mount Gulg. Without them, Marilith's attack count overwhelms most parties.
Circle of Sages: Walk to the ring of sages on the east side of town. They give you the Canoe, a small boat that lets you navigate rivers on the overworld map. You need it to reach Mount Gulg and several later locations.
H2: Mount Gulg
Paddle up the river directly north of Crescent Lake and follow it to the base of the volcano. Mount Gulg has five floors with lava fields covering large sections of each level.
Lava damage: Every step on a lava tile deals damage. Move through lava sections quickly and avoid backtracking across them. Use Tents on the lower floors to restore HP and MP between sections rather than wasting Curaga casts on lava chip damage.
Enemy notes: Most Mount Gulg enemies are weak to ice. Blizzara and Blizzard deal strong damage throughout the dungeon. Save a few MP for Marilith though -- she has no elemental weakness and the fight will drain your casters.
Chest highlights across all 5 floors:
- Floors 1-2: Potions, Tents, and early armor pieces
- Floors 3-4: Gold Armor, Power Staff, and other meaningful gear upgrades
- Floor 5: A chest room just before Marilith holds high-value equipment -- clear it before the boss fight
The dungeon path is mostly linear but floors 3 and 4 each have branching side rooms. Check every room before going deeper. No chests are locked and none require a return trip.
H2: Boss -- Marilith
Marilith waits at the end of Floor 5. She is the Fire Fiend and the hardest boss you have faced.
Boss Stats:
- HP: 1,440
- Attack: 6 physical attacks per turn
- Weakness: None
- Resistance: Fire
Strategy: Cast NulBlaze on your first turn and Protera on the second. If you bought Invisira, use it on turn three. With all three buffs active, Marilith's output drops to manageable levels. Your fighters attack each turn while your Black Mage deals damage with Blizzara or physical attacks -- she has no weakness so consistent damage matters more than spell selection. Your White Mage heals anyone below 80 HP and refreshes NulBlaze when it wears off. The fight takes 6 to 8 rounds. If Marilith kills your White Mage in the first two rounds, reset and re-enter with full resources.
Rewards: Fire Crystal restored, 3,000 EXP, 4,000 Gil
H2: After the Fire Crystal
A teleporter appears after the fight to take you back to the surface. Head back to Crescent Lake to rest at the Inn and restock. The next chapter -- Cavern of Ice -- is a shorter dungeon but the ice damage and status effects inside hit hard. Stock up on Antidotes and Gold Needles before you sail.
CHAPTER COMPLETE
Collectibles this chapter: 37 Chests | 18 Enemies | 1 Boss
Navigation: Previous: Melmond | Next: Cavern of Ice
RELATED GUIDES
- Mount Gulg Chests -- All chest locations across 5 floors
- Marilith Boss Guide -- Full stats and strategy for the Fire Fiend
- Classes and Party Builds -- Best party setup for the mid-game