2026 Bio-Organic Progression System

Surgery Kit: Complete Technical Analysis

Master the primary technological interface between hunter and supernatural evolution through biological material extraction, Devil's Heart surgery, and the risk-versus-reward extraction economy

Free from Dorian GravesDevil's Heart GatewayTiered Success RatesAnimation Lock Risk

Fundamental Architecture: What is the Surgery Kit?

The Surgery Kit is classified as a high-precision extraction tool designed for the recovery of devil-specific biological components from incapacitated human and fiend targets. Within the 2026 iteration of the Devil Hunter ecosystem, it represents a paradigm shift in Roblox-based action RPGs, moving away from traditional static progression toward a dynamic, bio-organic resource economy.

Unlike traditional RPGs where you "kill and loot," Devil Hunter requires you to "kill and process"—manually extracting organs through a stationary, vulnerable harvesting sequence. This tool serves as the primary technological interface between the player and the supernatural evolution mechanics that define the Chainsaw Man-inspired setting.

The Surgery Kit enables collection of Devil Hearts (the apex resource for Hybrid transformation), Anatomical Limbs, Devil Eyes, and Common Devil Flesh—each serving distinct purposes in the contract system, Fear Level progression, and the Black Market economy.

Devil's Heart

Apex resource required for Hybrid transformation surgery. Rare drop with tiered success rates (40% from Legendary targets).

Contract Materials

Limbs, Eyes, and specialized organs needed for high-tier devil contracts (Fox, Future, Ghost Devil).

Devil Flesh

Primary fuel for Fear Level increases among fiends. Essential for unlocking skill trees at levels 10, 25, 30.

Acquisition Protocols and Economic Impact

The 2026 meta provides four primary pathways for obtaining Surgery Kits, each tailored to a specific stage of player progression. Every new aspirant receives one free kit at journey commencement, but sustainable careers require strategic acquisition planning.

Method 1: Dorian Graves - FREE Surgery Kit

RECOMMENDED

Who is Dorian Graves?

Dorian Graves, identified in-game as "Senior Devil Hunter", is a pivotal NPC who serves as the primary gateway to the game's deeper systems. He is the most efficient source for obtaining a Surgery Kit without Yen expenditure.

💡 Strategic Value:

• Saves 3,500 Yen for weapon upgrades
• Unlocks Black Market access
• Reliable stationary location
• No combat risk to obtain

Location & How to Find

Exit Public Safety Headquarters

From spawn, walk out the main gate (press E key to interact with doors)

Turn Right & Look for Bench

You will see an older NPC sitting on a wooden bench holding a flask

Interact with Dorian

Talk to him - dialogue reveals his name and provides free Surgery Kit quest

⚠️ Danger Zone Warning: The area outside Headquarters is a high-traffic PvP zone. Use high-mobility skills or dash to reach Dorian safely. Combat Lock prevents re-entry if attacked.

Method 2: Commercial Procurement - Division 2 Counter

For hunters who miss Dorian's quest or require additional kits, the primary commercial source is the internal shop at Division 2 within the Headquarters building.

Purchase Details

Location: Division 2 Room (inside Headquarters)

Exact Position: Left-side counter upon entering room

Cost: 3,500 Yen (fixed price)

Stock: Unlimited quantity, instant inventory add

Economic Context

In the early-game economy, where missions yield only a few hundred to a thousand Yen, the 3,500 Yen price point is significant. This creates deliberate tension:

"Should I invest in a Surgery Kit gamble, or save for a permanent green/uncommon weapon upgrade?"

💡 Strategic Recommendation:

Only purchase Surgery Kits after establishing a "stable" weapon set (green/uncommon quality minimum). A kit is useless if you cannot defeat the targets you intend to harvest. Budget wisely and maintain Yen reserves for healing items.

Method 3: Level 10 Medical Training

Upon reaching Level 10, players unlock a specific quest chain that rewards a Surgery Kit upon completion.

Unlock: Fear Level 10+

Type: Mastery check quest

Reward: Surgery Kit (permanent item)

✓ Bypasses Yen cost through progression milestone

Method 4: Raid Drop Integration

High-level raids have localized loot tables that include Surgery Kits as potential drops, allowing endgame sustainability through combat.

Sources: Bat Devil Raid, Katana Man Raid, Zombie Raid

Drop Rate: Variable by raid tier

⚡ Endgame players sustain harvesting through combat proficiency rather than financial expenditure

Core Functional Loop & Extraction Mechanics

The mechanical operation of the Surgery Kit follows a strict procedural sequence. The implementation reflects a "risk-versus-reward" philosophy where hunters must secure a tactical victory before engaging in a stationary, vulnerable harvesting sequence.

Procedural Sequence

Utility Phase	Action Requirement	Contextual Risk
Preparation	Transition Surgery Kit to active hotbar	Tactical distraction during active combat
Incapacitation	Defeat Human/Fiend target completely	Required prerequisite for interaction
Extraction	Stationary animation sequence (3-5 seconds)	Vulnerability to third-party PvP "sniping"
Finalization	Automatic inventory transfer	Success/failure determination based on probability

The Extraction Animation Lock - Critical Vulnerability

When you approach a defeated fiend or devil with the Surgery Kit equipped, a contextual interaction prompt appears. Activating triggers a 3-5 second harvesting animation where your character crouches over the target in a locked state.

⚠️ During Extraction You CANNOT:

✗Move your character or dash away
✗Defend yourself or parry attacks
✗Cancel the animation once started
✗Use abilities or contracts

✓ Safety Protocols:

•Clear the vicinity of all enemies before extraction
•Work in teams - one harvests, one provides security
•Harvest in Division-controlled safe zones
•Avoid extraction near Headquarters (PvP hotspot)

⚔️ PvP Corpse Camping: The animation lock makes Surgery Kit usage a focal point for PvP conflict. Enemy players commonly wait for hunters to start harvesting before attacking, capitalizing on the vulnerability window for easy eliminations.

Statistical Modeling of Extraction Efficacy

One of the most complex aspects of the 2026 Surgery Kit is the tiered success rate system. This ensures that while basic materials are abundant, the components for legendary builds remain gated behind a combination of skill and probability.

📊 Probability Model:

The success of an extraction is inversely proportional to the rarity of the target entity. This necessitates a "farming" mindset for rare components, as a single kit usage does not guarantee a successful yield of a Devil Heart.

Target Rarity Class	Success Probability (P_s)	Typical Material Yield
Common Fiends	90%	Devil Flesh, Basic Limbs
Uncommon Fiends	75%	Enhanced Flesh, Eyes
Rare Fiends	60%	Rare Limbs, Low-grade Heart
Epic Fiends	50%	High-grade Heart Fragments
Legendary Fiends	40%	Pristine Devil Heart

Mathematical Implications for Hybrid Progression

For hunters attempting to secure a Pristine Devil Heart from a Legendary target (such as a Raid Boss), the cumulative probability of success over multiple attempts follows the binomial distribution model:

P(at least 1 success) = 1 - (1 - 0.40)^n

Under this model, a hunter has approximately 87% chance of success after 4 attempts, highlighting the necessity of carrying multiple Surgery Kits into high-tier raids. Failed attempts do not permanently destroy the kit, but the interaction opportunity with that specific defeated fiend is lost.

Biological Materials & Contract System Integration

The Surgery Kit operates on a probability-based loot table influenced by the entity type. Each material has distinct utility in the contract system, Fear Level progression, and Black Market economy.

Component Type	Rarity	Primary Application
Common Devil Flesh	Common (90%)	Primary fuel for Fear Level increases among fiends. Essential for skill tree unlocks at levels 10, 25, 30.
Anatomical Limbs (Arm/Leg)	Uncommon (75%)	Specific requirements for mobility-based contracts and hybrid transformation components
Devil Eye	Uncommon (75%)	Necessary for vision-based abilities (Future Devil contract requirement)
Devil Heart (Pristine)	Legendary (40%)	Apex resource - critical for Hybrid transformation surgery and high-tier contract summons (Fox Devil)

💡 Farming Strategy:

The Devil Heart represents the pinnacle of harvesting. Due to its 40% drop rate from Legendary targets, players often engage in repetitive hunting of stronger fiends and raid bosses to secure hearts for Hybrid transformation. Consider farming Zombie Raid or Katana Man encounters for optimal heart acquisition efficiency.

The Hybrid Transformation Protocol

The ultimate objective for many human hunters is the transition into a Hybrid state. This is a multi-stage process that leverages the Surgery Kit as the final catalyst for evolution, requiring Fear Levels 75-100 and strategic resource accumulation.

Step 1: Obtaining a Devil's Heart

Devil's Hearts are the apex resource in the Devil Hunter economy. Three primary acquisition methods exist in the 2026 meta:

Map Exploration Spawning

Spawn Rate: 50% chance every 30 minutes

Server Type: Public servers only (no private server spawns)

📍 Common Locations:

• Hospital: Helipad & roof corners
• Urban Buildings: Ledges, railings
• Playground: Under slides, foliage
• Waterfront: Bridge pillars, near 7-11

Ito's 10 Bullets Quest

NPC Location: Basketball yard (rear map, near Zombie Raid entrance)

Objective: Collect 10 Bullets from Strong Devils/Bosses

Reward: Guaranteed Devil's Heart

Highly efficient for Zombie Raid farmers

Surgical Extraction

Method: Use Surgery Kit on Legendary Fiends/Raid Bosses

Success Rate: 40% for Legendary targets

Requires multiple attempts - carry several kits

💡 Pro Tip: Devil's Hearts are permanent items that remain in inventory after death/disconnect. Once obtained, they are secure until used for surgery.

Step 2: The Surgery Procedure

Once a Devil's Heart is secured, hunters must undertake the transplant surgery to achieve Hybrid status.

Accumulate 10,000 Yen

Standard surgery cost at the Hospital. Grind missions, raids, or use codes (75KLIKES: 200,000 Yen)

Visit the Hospital

Locate the Hospital building in central city. Enter and find the Nurse NPC

Initiate Transplant

Talk to Nurse → Confirm surgery → Pay 10,000 Yen → Receive random Hybrid type (1/8 chance each)

✓

Transformation Complete!

Press T key to toggle Hybrid form. Transformation heals 40% max HP (charge system)

⚠️ PERMANENT DECISION: Hybrid surgery is 100% irreversible. Once transformed, you cannot revert to Human or Fiend status without reset codes.

Hybrid Transformation Mechanics

✓Transform with T Key: Access unique hybrid abilities
✓Enhanced Combat: Devastating transformation powers
✗Cannot use contracts: While transformed, contract skills are disabled
✗Cannot use items: Equipped items are disabled during transformation

Cost Breakdown

Devil's HeartHarvested

Surgery Fee10,000 Yen

Total Investment~10,000 Yen + Time

Random Hybrid Types

There are currently 8 hybrid types with equal chance for each one:

• Bomb, Chainsaw, Flamethrower (S-Tier)
• Deep Sea (A-Tier)
• Katana (B-Tier)
• Whip, Shield (Lower Tiers)

Check our Tier List for rankings!

The Contract Economy

Translating Biology into Power

The fundamental purpose of the Surgery Kit is to fuel the Contract System. In Devil Hunter, powers aren't gained through traditional level-ups but through a ritualized exchange of Yen and harvested organs.

The 20,000 Yen Benchmark

A common requirement for mid-tier contracts is the "20,000 Yen Barrier". This sum is required to pay Senior Hunters or Contract Dealers who provide access to finalize contracts.

Contract Dealers & NPCs

NPC	Role	Relevant Items
Dorian Graves	Advanced Progression/Contracts	Rare Organs, Yen
Division Leader	Initial Quests & Gear	Basic Yen, Common Flesh
Senior Hunter	Contract Advice	20k Yen, Specialized Organs

Learn more about Hybrid System and Devil Contracts.

Bio-Organic Economy: Black Market & Fear Levels

The items harvested by the Surgery Kit are the lifeblood of the Black Market. Unlike standard Headquarters shops, the Black Market deals in rare, often illegal materials that facilitate supernatural growth.

The Black Market

Speaking with Dorian Graves unlocks access to the Black Market, located in the immediate vicinity outside Headquarters. This vendor specializes in high-value items required for endgame progression.

Surgery Kits

Backup source if Dorian's quest is missed. Price: 3,500 Yen

Wipe Tokens (400,000 Yen)

Reset contracts or race rolls. Safety net for failed surgeries or undesirable hybrids

Eraser Devils

Allow resetting of contracts and body parts. Critical for "L-transform" failures (inferior hybrid forms)

Devil Flesh (Limited Stock)

Rotating availability - significantly more expensive than harvesting yourself

Fear Level & Devil Flesh Utility

For Fiend players, harvested Devil Flesh is the only way to increase Fear Level and unlock their skill trees.

Fiend Type	Level 10 Skill	Level 25 Skill	Level 30 (Apex)
Angel	Materialize (Weapon)	Materialize: Spear	Year Drain (Life Steal)
Blood	Blood Hammer	Blood Spill (Spikes)	Blood Scythe (Rapid Dash)
Nail	Strike! (Lvl 8)	Nail Impalement	Nail Bounce (High mobility)
Shark	Dive (Lvl 8)	Jaws (Bite Rush)	Maul (Aerial Grabs)

⚡ Efficiency Note: Without the Surgery Kit, Fiend players must rely on the Black Market's rotating Devil Flesh stock, which is significantly more expensive and less reliable than self-harvesting.

January 2026 Promotional Codes

For hunters looking to jumpstart their Surgery Kit budget or obtain essential reroll items, the following codes are active as of January 2026. Enter these codes via the Phone Menu (press N key → blue bird icon → "Codes").

75KLIKES

BEST

200,000 Yen

+ Clan/Fiend Reroll

Requirement: Join Roblox Group

100KLIKES

2x Fiend/Clan/Hair Rerolls

Requirement: First Class Hunter Rank

SHUTDOWNSORRY

75,000 Yen

+ Skill Point Reset

Requirement: Unlock Phone Menu

RELEASE2026

35,000 Yen

+ Fiend/Clan Reroll

Requirement: Join Game Group

MELO150K

75,000 Yen

+ Multiple Rerolls

Requirement: Complete Tutorial

RemoveMyHybridTHX

Hybrid Reset

Wipes current Hybrid status

Use if you get undesired hybrid

💡 Strategic Use: The 75KLIKES code (200,000 Yen) can fund approximately 20 Surgery Kits or 20 Hybrid surgeries. This is the most efficient way to stockpile resources for endgame progression.