Part 4: West Fortress Lab Walkthrough Hub Part 6: Final Bosses & 100%

Area Intro Briefing

Area Summary

The Dark Realm (Phantom Realm) is an optional 20-floor vertical gauntlet accessed through hanging Oni trickster portals. Each floor pits you against escalating waves of demonic warriors with no checkpoints.

Prerequisites

Part 4 completed, all 3 weapons (Raizan, Enryu, Shippu) maxed at Level 3, Gauntlet Level 3.

Recommended Setup

Gauntlet: Level 3 (Max)
Weapons: Raizan Lv3, Enryu Lv3, Shippu Lv3
Stats: 8 Power Jewels (+80% HP), 8 Magic Jewels (+80% MP)
Consumables: 5 Medicines, 10 Herbs, Full Burst Bullets

What to Upgrade First

Bishamon Sword Unlock. Clearing Floor 20 rewards you with the Bishamon Ocarina, which unseals the bone gate before the final boss to yield the one-hit kill Bishamon Sword.

Primary Objectives

Enter the Dark Realm via the trickster hanging priest in the Netherworld elevator.
Clear Floors 1–5 using basic katana Issen counters for free healing souls.
Clear Floors 6–10 using Shippu cyclones against agile Ninja Genma.
Clear Floors 11–15 using Enryu flame bursts against heavy armor giants.
Clear Floors 16–20 and claim the Bishamon Ocarina on Floor 20.

Optional Secrets & Missables

Floor 6 Chest: Fluorite #8
Floor 11 Chest: Fluorite #9
Floor 17 Chest: Fluorite #10
Floor 20 Altar: Bishamon Ocarina & 50,000 Red Souls

Area Item Databank

1. Key Items, Jewels & Fluorites (Click to Expand)

Item	Location	Effect
Bishamon Ocarina	Dark Realm Floor 20	Unlocks the Demon Realm bone gate holding Bishamon Sword
Fluorite #8	Floor 6 Treasure Chest	Collectible #8
Fluorite #9	Floor 11 Treasure Chest	Collectible #9
Fluorite #10	Floor 17 Treasure Chest	Collectible #10
Talisman of Resurrection	Floor 18 Treasure Chest	Auto-revives you with full HP & MP upon death

2. The Ultimate Weapon (Click to Expand)

Weapon	Element	Special Ability
Bishamon Sword	Dark Void / Godly Energy	Infinite magic power; kills standard enemies in a single slash

3. Consumables & Soul Yield (Click to Expand)

Item	Quantity	Usage
Medicine	x4	Emergency healing during Floors 15–20
Total Red Souls	~60,000 Souls	Completely maxes all reserve items and ammo

20-Floor Survival Strategy

Floors 1 – 5: Basic Footsoldiers & Soul Harvesting

Standard zombie swordsmen and footsoldiers. Do not spend Magic. Practice timing your Issen counters on their overhead chops to yield massive yellow health souls and blue magic souls.

Floors 6 – 10: Ninja Genma & Floor 6 Fluorite #8

Open the chest on Floor 6 to collect Fluorite #8. Ninja Genma will spawn in packs of 4. Equip Shippu and use spinning naginata flurries to keep them staggered.

Floors 11 – 15: Heavy Armor Barabazu & Floor 11 Fluorite #9

Open the chest on Floor 11 for Fluorite #9. Massive axe giants and shield-bearers fill the arena. Switch to Enryu and cast Fire Magic to shatter their shields in one burst, then execute downed stabs.

Pro-Tip (Purple Soul Onimusha Transformation): On Floors 16–20, collect 5 Purple Souls to transform into the invincible Onimusha Demon Form for 20 seconds. Mash attack to obliterate everything in the room without taking damage!

Floors 16 – 20: Elite Genma Lords & Floor 20 Bishamon Ocarina

Collect Fluorite #10 on Floor 17. On Floors 19 and 20, you face dual Marcellus clones. Use Raizan Thunder Magic bursts combined with Matchlock Burst Bullets to drop them. Step onto the Floor 20 altar to receive the Bishamon Ocarina!

TACTICS WARNING: How to Use the Bishamon Ocarina & Sword

Unlocking the Bishamon Sword:

Return to the Demon Realm entrance right before the final boss door.
Locate the skeletal bone gate with the ominous face carving.
Use the Bishamon Ocarina from your inventory. The gate will open, revealing the glowing Bishamon Sword on a pedestal.
Equipping this weapon grants unlimited magical shockwaves with zero MP consumption!