How to Start Guardian’s Box Myth 🗺️
Unlike most side quests in Nioh 3, Guardian’s Box has no NPC marker on the map. You must meet specific prerequisites before activation.
Prerequisites Checklist ✅
- Reach Hachijo region (southern Heian)
- Clear Rajomon barrier (part of main quest)
- Defeat Rajomon boss fight
- Unlock Rajomon: Suzaku Avenue shrine
💡 Pro tip: This quest isn’t available immediately in Heian. You must progress the main story to Hachijo region and clear the barrier there.
Step-by-Step Walkthrough 🎯
Phase 1: Clear Rajomon Barrier
Location: Hachijo region (southern map)
What to do:
- Find Rajomon barrier in Hachijo
- Clear all enemies in the area
- Defeat the boss at the end of the section
- Completion unlocks quest trigger
You might be wondering: Do I need to clear the entire Rajomon area or just the barrier? Only the barrier itself and boss fight. Surrounding enemy bases aren’t required.
Phase 2: Find the Onmyo Mage
Starting point: Rajomon: Suzaku Avenue shrine
Navigation:
- Fast travel to Rajomon: Suzaku Avenue
- Run north
- You’ll encounter a Wheelmonk along the way (optional enemy)
- Continue north until you find the Onmyo mage on the ground
| Step | Action | Detail |
|---|---|---|
| 1 | Fast travel | Rajomon: Suzaku Avenue |
| 2 | Direction | North from shrine |
| 3 | Enemy | Wheelmonk (optional) |
| 4 | NPC | Onmyo mage asking for help |
Dialogue:
- Onmyo mage tells you warriors stole his box
- Accept quest to continue
- No quest marker appears – you must know where to go
❌ Common mistake: Looking for a quest marker on the map. This quest has no visual marker – you need to know the exact Spirit Vein location.
Phase 3: Find the Stolen Box 📍
Direction: West from the Onmyo mage
How to get there:
- From Onmyo mage’s position, run west
- Look for the Spirit Vein (purple portal)
- Use Spirit Vein to teleport to the other side
- Enter the building
💡 Pro tip: The Spirit Vein is easily visible due to its purple aura. If you don’t see it, you’re not far enough west.
Phase 4: Demon Slayer Boss Fight ⚔️
Boss: Demon Slayer
Difficulty: Medium
Mechanic: Bloody Grave initiation
Pre-fight preparation:
✓ Use Ochoko Cups to summon help
✓ Stock elixirs and healing items
✓ Equip gear effective against human enemies
✓ Prepare Ki pulse combos
Boss strategy:
Demon Slayer patterns:
- Aggressive melee combos
- Guard breaks possible
- High damage output
- Parry opportunities
How to defeat:
- Maintain distance for reaction time
- Punish openings after combo chains
- Ki management is critical
- Yokai abilities for burst damage
⚠️ Warning: Don’t underestimate this fight. Demon Slayer has high damage output and aggressive AI. If you’re underleveled, consider summoning.
Phase 5: Kurama Tengu Dialogue 🗣️
After defeating Demon Slayer:
- Interact with the chest in the room
- Kurama Tengu appears for conversation
- Dialogue continues automatically
- Onmyo mage returns
What to expect:
- Story reveal about the stolen box
- Kurama Tengu provides context
- Setup for final fight
Phase 6: Final Double Boss Fight 👹
Bosses: Ninja Yoki + One-eyed Oni
Difficulty: High
Type: Simultaneous dual encounter
Enemy breakdown:
| Boss | Type | Primary Threat |
|---|---|---|
| Ninja Yoki | Fast, agile | Combo chains, mobility |
| One-eyed Oni | Strong, tanky | Heavy hits, grab attacks |
Winning strategy:
Prioritization:
- Focus Ninja Yoki first – faster elimination
- Kite One-eyed Oni during Yoki fight
- After Yoki death, 1v1 with Oni
Tactical tips:
✓ Use environmental obstacles for separation
✓ Never fight both simultaneously head-on
✓ Save Yokai abilities for Oni phase
✓ Ki pulse between each engagement
💡 Pro tip: If you summoned help for the Demon Slayer fight, they’ll stay with you for this encounter. Use their aggro for safer damage windows.
Quest Rewards 🎁
After successfully completing all phases, you receive:
Equipment drops:
- Random gear pieces (level-scaled)
- Possible rare/exotic drops
Guaranteed rewards:
✓ Ninja’s Locks (key item/material)
✓ Smithing Text: Brave Demon Hunter’s Armor
✓ Experience points
✓ Amrita
Brave Demon Hunter’s Armor Smithing Text
This is the main reward of the quest:
What it enables:
- Crafting Brave Demon Hunter armor set
- Access to specific stat bonuses
- Build diversity options
Value:
- Essential for players building ninja/dex builds
- Good stats for mid-to-late game
- Collector value
FAQ
Q: What level should I be for this quest?
A: I recommend level 70+ minimum. Demon Slayer and double boss fight are challenging encounters.
Q: Can I do this quest in co-op?
A: Yes, use Ochoko Cups to summon before each boss fight. Highly recommended for the final encounter.
Q: What if I can’t find the Spirit Vein?
A: Run directly west from the Onmyo mage. The Spirit Vein has a purple aura and is visible from a distance.
Q: Is Brave Demon Hunter’s Armor a good set?
A: Yes for ninja builds. Provides solid stats and bonuses for dex-focused characters.
Q: Can I do the quest before completing the Rajomon main quest?
A: No, the Rajomon barrier must be cleared first. This is a hard prerequisite.
Q: Do Demon Slayer or double bosses respawn?
A: No, after quest completion, bosses are permanently defeated. Quest is one-time only.
Q: What do I do if I die during the quest?
A: You respawn at the nearest shrine. Grave remains at death location. Enemy clear progress may reset.
