This chapter covers a large chunk of FF4's middle game: the first trip through the Tower of Babil, Eblan Castle exploration, the Cave of Eblan, and the second trip through the Tower leading to Rubicante. There's a lot of missable content here, so pay close attention.
MISSABLE DUNGEON WARNING
The Tower of Babil has TWO one-time-only sections. The first visit from the Underworld has 16 chests and several missable monsters. The second visit through Eblan Cave has 8 more chests and additional missable monsters. After defeating Rubicante, you cannot return to either section.
Tower of Babil - Part 1 (From Underworld)
Party: Cecil, Kain, Rosa, Rydia, Yang
From the Dwarven Castle, head north through the cave system to reach the Tower of Babil. This massive structure connects the Underworld to the surface world. Yang will leave your party permanently at the end of this section.
Missable Bestiary - Part 1
The following monsters are permanently missable if not encountered during this section:
| Monster | Notes |
|---|---|
| Evil Doll | Only in first Tower of Babil section |
| Fiery Knight | Only in first Tower of Babil section |
| Chimera | Only in first Tower of Babil section |
| Stone Golem | Only in first Tower of Babil section |
| Mystery Egg | Only in first Tower of Babil section |
| Naga | Floors 6F-7F only |
| Security Eye | Floors 6F-7F only |
| Medusa | Floors 6F-7F only |
Floor-by-Floor Walkthrough
1F: Collect two chests on the left side (Emergency Exit, Hi-Potion) and one on the right (Ether). Proceed upward to the next floor.
2F: Grab the chest on the left for a Green Beret. Enter door A to fight a Security Eye that summons a Chimera - defeat them for the Icebrand sword. Exit and enter door B to defeat another Security Eye with a Stone Golem for the Ice Lance.
3F: Collect the Cat Claw on the left (upgrade for Yang), Hi-Potion on the right, and Phoenix Down in the center. Enter the door to reach 4F.
4F: Get the Killer Bow and Antarctic Wind from two accessible chests. Return to 3F and use alternate door B. Enter door C to defeat a Security Eye with Fiery Hound for Ice Armor. Enter door E to defeat a Security Eye and Naga for the Ice Shield.
5F: Retrieve Arctic Wind and Hi-Potion from chests on the right side. The center door is locked for now - you'll need the Doctor's Key. Proceed upward.
6F: Navigate left side only. Fight encounters here to register Naga, Security Eye, and Medusa for your bestiary.
7F: Find the save room on the right. Collect the Dry Ether from the center chest. Head upward to the boss area.
8F: Follow the left path to reach the boss encounter.
Enemy List - Part 1
| Enemy | HP |
|---|---|
| Puppeteer | 473 |
| Goblin Captain | 199 |
| Magma Tortoise | 435 |
| Chimera | 700 |
| Fiery Knight | 579 |
| Medusa | 490 |
| Black Lizard | 792 |
| Stone Golem | 2,560 |
| Naga | 320 |
MISSABLE BOSS WARNING
In the Dr. Lugae fight, you must defeat Barnabas (the robot) BEFORE Dr. Lugae to get the Barnabas-Z bestiary entry. If you kill Lugae first, Barnabas-Z never appears and you'll miss the entry permanently.
Boss: Dr. Lugae and Barnabas
A mad scientist and his robot companion. Focus all attacks on Barnabas to trigger the Barnabas-Z transformation.
Strategy
- Have Cecil and Yang attack Barnabas with physical strikes.
- Kain should use Jump targeting Barnabas.
- Rydia casts Titan for area damage.
- Rosa focuses on healing the party.
After Barnabas falls, he revives as Barnabas-Z. Continue the same strategy.
Warning
- Barnabas-Z will self-destruct when defeated, potentially killing party members.
- Have Rosa ready with healing or Phoenix Downs.
The doctor transforms into a cyborg form. He can inflict Sleep and Poison.
Strategy
- Use Esuna or items to counter Sleep and Poison.
- Physical attacks and Rydia's summons finish him quickly.
Rewards: Doctor's Key
Super Cannon Event
After victory, you receive the Doctor's Key. Return to 5F and unlock the center door. Inside, you'll encounter three Goblin Captains (199 HP each). Defeat them, but the cannon controls are destroyed in the process.
Yang sacrifices himself by pushing the party out and locking the door as the cannons explode. He's gone for now (you'll see him later in the game).
Escape Sequence
Backtrack toward the entrance. The bridge collapses when Golbez appears. Your party escapes via Cid's airship (the Enterprise). Cid detonates a bomb to seal the Underworld entrance behind you, and your party is forced to the surface world.
Eblan Castle
After the Tower events, you'll eventually need to reach the Tower of Babil from the surface side. Fly to the area with Eblan Castle - the ruined kingdom destroyed by Rubicante.
The castle is optional but contains excellent treasure, including the Blood Lance and Hermes Shoes. Be warned that several chests are Monster-in-a-Box encounters with difficult enemies.
Castle Layout and Treasures
First Floor: Walk through the right wall to find a hidden Hi-Potion.
Throne Room and Second Floor: Hidden paths on both sides lead to treasures. The right path has Gold Needle and Cottage. The left path has Unicorn Horn and Alarm Clock.
West Tower: Contains the Sleep Blade (Monster-in-a-Box with Steel Golem and 4 Skuldiers). Descend hidden stairs for Bomb Core. Check pots for Bacchus's Cider. A hidden path leads to Mute Arrow and 10,000 Gil.
East Tower: Through the left wall on the first floor is a Coeurl Whisker. Second floor has Emergency Exit and Hi-Potion. The rightmost pot contains Hermes Shoes. The Blood Lance is a Monster-in-a-Box (2 Coeurls + Lamia). Lower level has Hi-Potion and Silver Hourglass.
Underground Passage: Two Ethers in the first two chests. The Silver Apple is a Monster-in-a-Box (3 Mad Ogres).
Monster-in-a-Box Enemies
| Enemy | HP | Weakness |
|---|---|---|
| Steel Golem | 1,950 | Ice |
| Coeurl | 593 | - |
| Lamia | 1,200 | - |
| Mad Ogre | 2,000 | Fire, Holy |
| Skuldier | - | - |
Cave of Eblan
The Cave of Eblan connects Eblan Castle to the Tower of Babil's surface entrance. This cave system has two main parts separated by the Eblan Settlement.
Cave Part 1
Three accessible chests in this section:
- Shuriken - through a right wall passage
- Remedy - through a second right wall passage
- Vampire Fang - past the bridge in the lower area
Descend to reach the Eblan Settlement.
Eblan Settlement
This hidden refuge is where Eblan's survivors fled after Rubicante's attack. The settlement contains:
- Inn (rest to recover)
- Item shop with standard supplies
- Weapon and armor shops with ninja equipment
- Two Potions hidden in pots within the living quarters
Buy Ninja equipment if you can afford it - Edge will be joining your party soon.
Cave Part 2 (Path to Tower)
Lower Floor - West Side: Ether from the initial chest. Tent from the second chest. Hi-Potion via hidden wall passage.
Upper Floor - West Side: Bomb Core openly accessible. Shuriken through the right wall.
Lower Floor - East Side: Three open chests contain Hi-Potion, Cottage, and Hi-Potion. A hidden wall path above the right chests leads to two Elixirs. Additional chests contain Spider's Silk, Silver Hourglass, and two Phoenix Downs.
Upper Floor - East Side (Save Room Area): The Blood Sword is a Monster-in-a-Box (2 Steel Golems). Gold Needle in a nearby chest. The Dry Ether is the final chest before the Edge encounter.
Meeting Edge
Near the cave's end, you'll encounter Edge, prince of Eblan, confronting Rubicante alone. After their confrontation, Rosa heals Edge and he permanently joins your party.
New Party Member: Edge is a Ninja with unique abilities. He can Throw weapons for massive damage (but loses the item), use Steal to grab enemy items, and cast Ninjutsu magic. He's fast and deals good damage but has lower defenses than Cecil.
Tower of Babil - Part 2 (From Surface)
Party: Cecil, Kain, Rosa, Rydia, Edge
With Edge in the party, the stairs from the Cave of Eblan lead to the surface-side of the Tower of Babil. This section is different from Part 1, with new enemies and 8 treasure chests.
SECOND MISSABLE SECTION
This section of the Tower also cannot be revisited. Make sure to collect all 8 chests and register all enemy types. Some enemies only appear AFTER defeating Rubicante but before leaving the tower entirely.
Missable Bestiary - Part 2
| Monster | Notes |
|---|---|
| Grudger | Tower revisit section |
| Ghost Knight | Tower revisit section |
| Sorcerer | Tower revisit section |
| Lamia Matriarch | After Rubicante only |
| Mythril Golem | After Rubicante only |
Floor-by-Floor Walkthrough
B1: Progress upward. Edge opens a hidden wall. Collect the Unicorn Horn from the left chest. Loop around to reach a bridge area with the Silver Hourglass.
B2: Head right across a bridge to find 4 Mad Ogres guarding the Ogrekiller axe. Return and proceed left to the next floor.
B3: Retrieve the Lilith's Kiss before entering the door to B4.
B4: Go right to collect the Ashura katana, then enter the left door.
B5: Traverse the left path for 82,000 Gil, then proceed to the Crystal Room entrance.
Boss: King and Queen of Eblan
Before reaching Rubicante, Edge confronts his parents who have been mutated into monsters. This is a story fight that leads directly into the Rubicante encounter.
Boss: Rubicante (34,000 HP)
The leader of the Four Archfiends and perhaps the most honorable. Before the fight, he fully heals your entire party. His cloak is the key to victory.
Cloak Mechanics
- Cloak UP (covering face): All spells will heal him. Only use physical attacks during this phase.
- Cloak OPEN: He's vulnerable to Ice and Water. Hit him with everything.
Strategy
- Cecil and Kain attack physically at any time - the cloak doesn't affect physical damage.
- Kain's Jump is effective throughout the fight.
- When the cloak opens, have Rydia cast Shiva or Blizzara.
- Edge can use Flood or Blitz Ninjutsu when the cloak opens.
- Rosa maintains healing - Rubicante's fire attacks hit hard.
- Edge can try to Steal for rare items.
Rewards: Edge learns Flood and Blitz abilities after the battle.
Post-Rubicante: Don't Leave Yet
Important: After defeating Rubicante, the crystals activate a trap door that drops your party to the Underworld portion of the tower. You must navigate through floors 8F and 6F to escape.
These floors contain:
- Two more Hi-Potions in treasure chests
- Lamia Matriarch enemies (only appear here)
- Mythril Golem enemies (only appear here)
Fight random encounters until you've registered both enemy types, then collect the remaining chests before exiting to the Falcon airship.
Exploit: You can re-enter the Underworld section of the tower without moving after landing the Falcon. This allows you to collect any missed items if you forgot something.
The Falcon Airship
After escaping the tower, you'll obtain the Falcon - a new airship docked in the Underworld. Return to the Dwarven Castle and speak with Cid to modify the Falcon to fly over lava.
What's Next
With the upgraded Falcon, you now have access to the entire Underworld:
- Tomra - Dwarven town with new equipment
- Kokkol's Forge - Famous blacksmith location
- Sylvan Cave - Complex dungeon with the Sylph summon quest
- Land of Summons - Hidden area with powerful summon bosses
- Sealed Cave - Your next story destination
Treasure Chests
Tower of Babil - Part 1 (16 Chests)
All permanently missable after defeating Dr. Lugae and escaping.
| Item | Location |
|---|---|
Emergency Exit | 1F, left side |
Hi-Potion | 1F, left side |
Ether | 1F, right side |
Green Beret | 2F, left chest |
Icebrand | 2F, door A (defeat Security Eye + Chimera) |
Ice Lance | 2F, door B (defeat Security Eye + Stone Golem) |
Cat Claw | 3F, left side |
Hi-Potion | 3F, right side |
Phoenix Down | 3F, center |
Killer Bow | 4F, first chest |
Antarctic Wind | 4F, second chest |
Ice Armor | 4F, door C (defeat Security Eye + Fiery Hound) |
Ice Shield | 4F, door E (defeat Security Eye + Naga) |
Arctic Wind | 5F, right side |
Hi-Potion | 5F, right side |
Dry Ether | 7F, center chest |
Eblan Castle (20 Chests)
These chests can be collected at any time. Many require finding hidden passages through walls.
| Item | Location |
|---|---|
Hi-Potion | 1F, through right wall |
Gold Needle | Throne Room, hidden right path |
Cottage | Throne Room, hidden right path |
Unicorn Horn | 2F, hidden left path |
Alarm Clock | 2F, hidden left path |
Sleep Blade | West Tower (Monster-in-a-Box: Steel Golem + 4 Skuldiers) |
Bomb Core | West Tower, hidden stairs |
Bacchus's Cider | West Tower, pot |
Mute Arrow | West Tower, hidden path |
10,000 Gil | West Tower, hidden path |
Coeurl Whisker | East Tower, through left wall |
Emergency Exit | East Tower, 2F |
Hi-Potion | East Tower, 2F |
Hermes Shoes | East Tower, rightmost pot |
Blood Lance | East Tower (Monster-in-a-Box: 2 Coeurls + Lamia) |
Hi-Potion | East Tower, lower level |
Silver Hourglass | East Tower, lower level |
Ether | Underground Passage, first chest |
Ether | Underground Passage, second chest |
Silver Apple | Underground Passage (Monster-in-a-Box: 3 Mad Ogres) |
Cave of Eblan (20 Chests)
Available until you leave the Tower of Babil after defeating Rubicante. Many hidden behind fake walls.
| Item | Location |
|---|---|
Shuriken | Part 1, right wall passage |
Remedy | Part 1, second right wall passage |
Vampire Fang | Part 1, past bridge in lower area |
Ether | Part 2, lower floor west - initial chest |
Tent | Part 2, lower floor west - second chest |
Hi-Potion | Part 2, lower floor west - hidden wall |
Bomb Core | Part 2, upper floor west |
Shuriken | Part 2, upper floor west - through right wall |
Hi-Potion | Part 2, lower floor east - first open chest |
Cottage | Part 2, lower floor east - second open chest |
Hi-Potion | Part 2, lower floor east - third open chest |
Elixir | Part 2, lower floor east - hidden wall path |
Elixir | Part 2, lower floor east - hidden wall path |
Spider's Silk | Part 2, lower floor east |
Silver Hourglass | Part 2, lower floor east |
Phoenix Down | Part 2, lower floor east |
Phoenix Down | Part 2, lower floor east |
Blood Sword | Part 2, save room (Monster-in-a-Box: 2 Steel Golems) |
Gold Needle | Part 2, upper floor east |
Dry Ether | Part 2, final chest before Edge encounter |
Tower of Babil - Part 2 (8 Chests)
All permanently missable after leaving the tower post-Rubicante.
| Item | Location |
|---|---|
Unicorn Horn | B1, left side |
Silver Hourglass | B1, after loop |
Ogrekiller | B2, bridge end (defeat 4 Mad Ogres) |
Lilith's Kiss | B3, before door |
Ashura | B4, right path |
82,000 Gil | B5, far left |
Hi-Potion | Underworld 8F (post-Rubicante) |
Hi-Potion | Underworld 6F (post-Rubicante) |