How to Get Them All Weapons in Roblox Kaizen (March 2026) Full Guide

Updated by Sunny Kaushik
February 13, 2026
Gaming

All Weapons in Roblox Kaizen Guide and How to Get Them

Welcome to the most comprehensive All Weapons in Roblox Kaizen Guide you’ll find anywhere! As someone who has spent countless hours exploring every corner of this Jujutsu Kaisen-inspired Roblox game, I’m excited to share everything you need to know about building the ultimate weapon arsenal. Whether you’re a beginner just starting your journey or a veteran looking to complete your collection, this guide will save you hours of trial and error.

In Roblox Kaizen, weapons are essential for progression and combat effectiveness. With over 13 different weapons available through various methods including NPC crafting, boss drops, and special requirements, knowing exactly where to find each weapon and how to obtain it efficiently is crucial for dominating both PvE and PvP content.

Quick Reference: All Weapons Overview

Weapon Name	Rarity	Acquisition Method	Level Requirement	Location
Slaughter Demon	Common	Purchase	None	Jujutsu Tech Blacksmith
Imperial Sword	Rare	Crafting	20+	Outskirts NPC
Menus Edge	Rare	Crafting	30+	Lotus Grave Area
Nanami’s Weapon	Grade 2	Crafting	40+	Mizuka Village
Jet Black	Legendary	Cursed Essences	50+	Sorcerer Arena
Inverted Spear of Heaven	Legendary	Crafting	75+	Main Gate (Maki NPC)
Cursed Daggers	Legendary	Crafting	95+	Cursed Cavern (Mia NPC)
Split Soul Katana	Legendary	Crafting	60+	Northwest Shibuya
Blood Scythe	Legendary	Boss Drop	70+	Eso (World Boss)
Frost Fangs	Legendary	Boss Drop	80+	Uraume (World Boss)
Death’s Harbinger	Legendary	Shop	60+	Weapon Store
Viper Edge	Rare	Shop	50+	Weapon Store
Divine Fate	Rare	Shop	55+	Weapon Store

NPC Crafting Weapons: The Foundation of Your Arsenal

1. Slaughter Demon – The Perfect Starter Weapon

Location: Jujutsu Tech – Blacksmith
Requirement: Purchase with Yen
Best For: Early game progression and beginners

The Slaughter Demon is arguably the best starting weapon in Roblox Kaizen. Available immediately from the blacksmith at Jujutsu Tech, this weapon provides excellent value for its cost. I recommend getting this weapon as soon as you start playing, as it will carry you through the early levels and help you complete initial quests efficiently.

Pro Tip: The Slaughter Demon scales with Imbued Cursed Energy, making it viable even into mid-game if you focus on upgrading your cursed energy stats early on.

2. Imperial Sword – Mid-Game Powerhouse

Location: Outskirts NPC (Level 20+ area)
Requirement: Crafting materials
Materials Needed:

Spirit Wood
Spirit Infused Wood
Fire Floater Head Core
Flying Head Core

The Imperial Sword represents your first major upgrade opportunity. Located in the outskirts area (accessible at level 20+), this weapon requires gathering specific materials from enemies in the region. While it might seem like a grind, the investment pays off significantly in damage output and versatility.

Strategy: Focus on farming Fire Floaters and Flying Heads in the outskirts area. These enemies respawn quickly, and you can gather materials efficiently by creating a farming route that covers their spawn points.

3. Menus Edge – The Swamp Specialist

Location: Lotus Grave area (open public NPC)
Requirement: Crafting materials
Best For: Players exploring Lotus Grave region

Menus Edge is crafted from an NPC in the Lotus Grave region. What makes this weapon special is its accessibility – the vendor stands in an open area rather than a hidden location, making it easier to find once you reach the swamp zone. The materials required drop from enemies native to this region, so you can gather them naturally while exploring.

Insider Tip: The Lotus Grave area becomes much easier to navigate once you have this weapon, as it provides bonuses against swamp-based enemies. Consider timing your crafting run with when you plan to explore this area extensively.

4. Nanami’s Weapon – Grade 2 Excellence

Location: Mizuka Village
Requirement: Crafting materials
Materials Needed:

Spotted Sea Pearls
Mutated Mushroom Core
Shroom Chief Core

As a Grade 2 weapon, Nanami’s weapon represents a significant power spike for mid-game players. The materials required come from various sources in the Mizuka region, making this weapon a natural progression point if you’re questing in that area.

Pro Strategy: The Shroom Chief Core has a 45% drop chance from the Shroom Chief boss, so you can farm this material while also gaining experience and other valuable drops. Combine this farming with your regular questing to maximize efficiency.

5. Jet Black – The Popular Choice

Location: Sorcerer Arena entrance
Requirement: 250 Cursed Essences
Why It’s Special: High demand and excellent performance

Jet Black is one of the most sought-after weapons in Roblox Kaizen, and for good reason. The NPC is conveniently located near the Sorcerer Arena spawn, but the real challenge is collecting 250 Cursed Essences. This weapon is worth the grind, as it performs exceptionally well in both PvE and PvP scenarios.

Farming Strategy: Focus on completing daily quests and participating in events that reward Cursed Essences. Server hopping during peak hours can also help you find more essence-rich activities.

6. Inverted Spear of Heaven – Late Game Mastery

Location: Outside the main gate near spawn (Maki NPC)
Requirement: Level 75 + crafting materials
Significance: Major late-game milestone

The Inverted Spear of Heaven is a game-changing weapon that requires reaching level 75. The NPC is conveniently located just outside the main gate near the starting area, but don’t let this accessibility fool you – the materials required are some of the rarest in the game.

Preparation Tip: Start collecting rare materials early in your journey, even before you reach level 75. This way, you’ll be ready to craft this weapon as soon as you meet the level requirement.

7. Cursed Daggers – End Game Excellence

Location: Cursed Cavern
Requirement: Level 95 + crafting materials
NPC: Mia (inside Cursed Cavern)

The Cursed Daggers represent one of the final weapons you’ll obtain in your Roblox Kaizen journey. Requiring level 95 and materials from high-level zones, these daggers are designed for endgame content and competitive PvP.

Advanced Strategy: The Cursed Cavern area where you craft these weapons also contains some of the best farming spots for enchantment crystals. Plan extended farming sessions in this area to maximize your material collection rates.

8. Split Soul Katana – Hidden Gem

Location: Northwest Shibuya (top-right corner of the map)
Requirement: Crafting materials
NPC: Maki NPC in northwest Shibuya

The Split Soul Katana is often overlooked by players who stick to main quest routes. Found in the northwest section of Shibuya, this weapon is rarer and not always listed in older resources, making it a hidden gem for dedicated explorers.

Exploration Tip: Take time to thoroughly explore the northwest corner of Shibuya. This area contains several hidden NPCs and secret paths that many players miss during their initial playthrough.

Boss Drop Weapons: The Ultimate Challenge

Understanding Boss Drop Mechanics

Before diving into specific boss weapons, it’s crucial to understand how boss drops work in Roblox Kaizen:

Damage Requirement: You must deal at least 15% of the boss’s max HP to qualify for drops
Respawn Times: Story bosses respawn in 1-5 minutes; World bosses respawn in 10 minutes
Drop Rates: Most boss weapons have low drop rates (2-10%)
Server Hopping: Consider switching servers for faster boss respawns

1. Blood Scythe – Eso’s Legacy

Dropped by: Eso (World Boss)
Location: Jujutsu Headquarters
Difficulty: High – requires team coordination
Drop Rate: Approximately 5%

The Blood Scythe is one of the most coveted weapons in Roblox Kaizen, dropped by the world boss Eso. This weapon requires significant preparation and teamwork to obtain, but the rewards are worth it.

Farming Strategy:

Assemble a dedicated team of 4-6 players
Coordinate attack patterns to maximize damage
Use voice communication for real-time strategy adjustments
Consider server hopping if Eso isn’t spawning

2. Frost Fangs – Uraume’s Prize

Dropped by: Uraume (World Boss)
Location: Frozen Peak
Difficulty: Medium-High
Drop Rate: Approximately 8%

Frost Fangs drop from Uraume, another challenging world boss encounter. This weapon is particularly valuable for players who focus on ice-based builds or frequently engage in PvP combat.

Pro Tips:

Bring fire-based attacks to exploit Uraume’s weakness
Stock up on healing items before attempting
Time your attacks to avoid Uraume’s ice area attacks
Consider farming during off-peak hours for less competition

Weapon Store Weapons: Convenience Meets Power

Premium Shop Weapons

The Weapon Store in the main village offers several high-tier weapons for players who prefer direct acquisition over farming or crafting:

Death’s Harbinger (S-Tier Legendary)

Ability: Soul Absorption – killing opponents partially restores cursed energy
Cost: High (premium currency)
Best For: Players who value sustainability in combat

Viper Edge (A-Tier Rare)

Ability: Berserk – low HP increases damage output
Cost: Medium-High
Best For: Aggressive playstyles and risk-takers

Divine Fate (A-Tier Rare)

Ability: Heavy Hits – increased damage and posture cost
Cost: Medium-High
Best For: Players who focus on breaking opponent posture

Amethyst (A-Tier Rare)

Ability: Berserk – similar to Viper Edge but with different stats
Cost: Medium
Best For: Mid-game players looking for reliable damage

Jet Black (B-Tier Legendary)

Ability: Balanced stats with no special ability
Cost: High
Note: Also available through crafting (250 Cursed Essences)

Weapon Tier List: Performance Rankings

Based on extensive testing and community feedback, here’s how all weapons rank in terms of overall performance:

S-Tier: Must-Have Weapons

Death’s Harbinger – Soul Absorption ability provides unmatched sustainability
Viper Edge – Berserk ability enables incredible comeback potential
Divine Fate – Heavy Hits ability excels in both PvE and PvP

A-Tier: Excellent Choices

Amethyst – Reliable performance with good scaling
Deadly Moo – Solid all-around weapon
Blood Scythe – Boss drop with unique abilities
Frost Fangs – Excellent for ice-based builds

B-Tier: Good Options

Jet Black – Balanced but lacks special abilities
Inverted Spear of Heaven – Good for specific builds
Nanami’s Weapon – Solid mid-game choice

C-Tier: Situational Weapons

Mantis Edge – Limited use cases
Final Wish – Outclassed by higher-tier options
Emerald Ascension – Niche applications

D-Tier: Avoid If Possible

Wayward Cutter – Basic stats, no special abilities

Advanced Weapon Acquisition Strategies

Efficient Farming Routes

To maximize your weapon collection efficiency, I’ve developed these optimized farming routes:

Early Game Route (Levels 1-30)

Start at Jujutsu Tech → Purchase Slaughter Demon
Move to Outskirts → Farm Imperial Sword materials
Progress to Lotus Grave → Gather Menus Edge materials
Return to base → Craft and upgrade

Mid Game Route (Levels 30-70)

Mizuka Village → Nanami’s Weapon materials
Sorcerer Arena → Cursed Essence farming for Jet Black
Boss circuit → Eso and Uraume attempts
Shibuya exploration → Split Soul Katana materials

End Game Route (Levels 70+)

Cursed Cavern → Cursed Daggers materials
World boss focus → Blood Scythe and Frost Fangs
High-level material farming → Inverted Spear of Heaven
PvP preparation → Optimize weapon loadouts

Material Management Tips

Proper material management is crucial for efficient weapon progression:

Priority System: Focus on materials for your next target weapon
Storage Strategy: Keep extra rare materials for future updates
Trading Opportunities: Some materials can be traded with other players
Event Bonuses: Participate in events that offer material multipliers

Server Hopping Techniques

For boss weapons and rare materials, server hopping is essential:

Timing: Hop servers during peak hours for more boss spawns
Coordination: Use Discord or voice chat to coordinate with friends
Efficiency: Create a server-hopping route that covers multiple bosses
Patience: Some weapons require 20+ attempts to drop

Weapon Synergies and Build Optimization

Optimal Weapon Combinations

Different weapons work better with specific builds and playstyles:

Aggressive Build

Primary: Viper Edge (Berserk ability)
Secondary: Death’s Harbinger (sustainability)
Stats Focus: Critical rate, attack speed

Defensive Build

Primary: Divine Fate (posture breaking)
Secondary: Jet Black (balanced stats)
Stats Focus: Defense, HP regeneration

Elemental Build

Primary: Frost Fangs (ice synergy)
Secondary: Blood Scythe (life steal)
Stats Focus: Elemental damage, effect duration

Hybrid Build

Primary: Amethyst (versatility)
Secondary: Inverted Spear of Heaven (utility)
Stats Focus: Balanced stats across the board

Clan and Weapon Synergies

Certain clans enhance specific weapon types:

Gojo Clan – Enhances cursed energy scaling weapons
Sukuna Clan – Boosts damage output for aggressive weapons
Megumi Clan – Improves weapon acquisition rates
Nobara Clan – Increases critical hit chances

Pro Tip: Experiment with different clan-weapon combinations to find your optimal setup. Some unexpected pairings can create powerful synergies.

Common Mistakes to Avoid

Based on my experience helping hundreds of players, here are the most common mistakes to avoid:

1. Ignoring Weapon Scaling

Many players focus only on base damage without considering how weapons scale with different stats. Always check whether a weapon scales with Strength, Imbued Cursed Energy, or other stats before investing heavily.

2. Wasting Materials on Low-Tier Weapons

Don’t invest rare materials in weapons you’ll quickly outgrow. Focus on weapons that will remain relevant as you progress.

3. Poor Boss Farming Strategy

Randomly attacking bosses without strategy leads to wasted time. Always go prepared with the right team, items, and knowledge of boss patterns.

4. Neglecting Weapon Upgrades

Upgrading weapons is often more cost-effective than constantly acquiring new ones. Focus on upgrading your primary weapons before seeking new ones.

5. Ignoring Community Events

Limited-time events often offer exclusive weapons or materials. Stay active in the community to avoid missing these opportunities.

Frequently Asked Questions

How do I get the Death’s Harbinger weapon?

Death’s Harbinger is available from the Weapon Store in the main village. It costs premium currency but offers the Soul Absorption ability, making it worth the investment for dedicated players.

What’s the fastest way to get Cursed Essences?

The most efficient method is completing daily quests and participating in world events. Server hopping during active events can also yield significant amounts of Cursed Essences.

Can I trade weapons with other players?

Currently, weapons cannot be directly traded in Roblox Kaizen. However, some crafting materials can be traded, allowing for indirect weapon acquisition cooperation.

How often do new weapons get added to the game?

The developers typically add new weapons with major updates, which usually occur every 2-3 months. Follow the official Discord for announcements about new weapon releases.

What’s the best weapon for beginners?

The Slaughter Demon is the best choice for beginners due to its accessibility, low cost, and good scaling with Imbued Cursed Energy stats.

How do I increase my chances of getting boss weapon drops?

To maximize boss drop chances:

Deal at least 15% of the boss’s max HP
Participate in events that increase drop rates
Join dedicated boss farming groups
Use weapons and abilities that increase drop rates

Are there any limited-time exclusive weapons?

Yes, special events and holidays often feature exclusive weapons. These are typically announced through the official Discord and in-game notifications.

Conclusion

Building your weapon collection in Roblox Kaizen is a journey that requires strategy, patience, and dedication. By following this comprehensive guide, you now have all the knowledge needed to efficiently acquire every weapon in the game.

Remember that weapon collection is an ongoing process. The game continues to evolve with regular updates introducing new weapons and balancing changes. Stay connected with the community through the official Discord server and Reddit community to stay updated on the latest developments.

Whether you’re aiming to complete your collection for bragging rights or want to optimize your combat effectiveness, this guide provides the foundation for success. The key is to balance efficient farming with enjoying the game – after all, Roblox Kaizen is meant to be fun.