Nocturne Fusion Calculator

Your expert tool for navigating the complex Fiend and special fusions of Shin Megami Tensei III: Nocturne.

Fusion Result Will Appear Here

Select your ingredients to begin. A Deathstone is always required for Fiend fusions.

What is a Nocturne Fusion Calculator?

A nocturne fusion calculator is an essential tool for players of the notoriously challenging game, Shin Megami Tensei III: Nocturne. Unlike standard demon fusions, certain powerful demons—most notably the Fiends—cannot be created through normal means. This calculator specializes in those unique “accidents” and special recipes, helping you understand exactly what you’ll get from a specific combination under very specific circumstances.

This tool is for players who want to move beyond basic fusion and master the game’s most arcane systems. It removes the guesswork from creating Fiends, which requires a specific combination of a demon family, an elemental, a Deathstone item, and the correct phase of the in-game moon, Kagutsuchi. Using a reliable SMT Nocturne demon fusion guide like this calculator saves time, Macca, and frustration.

The Fiend Fusion Formula and Explanation

Fiend fusion is not a mathematical formula but a specific, rule-based recipe system. The core formula is:

(Demon Family + Element) + Deathstone @ Specific Kagutsuchi Phase = Fiend

Each Fiend is tied to a pair of demon families and a specific phase of Kagutsuchi. You must fuse one of the required families with any Element demon while holding a Deathstone during the correct moon phase. This calculator simplifies the process by showing you the direct outcome. For more details on the process, check out our guide to mastering the burial chambers where many Fiends are found.

Fiend Fusion Variables

Variables controlling the outcome of a Fiend fusion.

Variable	Meaning	Unit / Type	Typical Range
Demon Family	The race of the non-elemental demon used.	Race (e.g., Vile, Night)	Specific list of races.
Element	The elemental demon being fused.	Race (Aeros, etc.)	Aeros, Aquans, Erthys, Flaemis.
Deathstone	A required consumable item for the fusion.	Item	Must be in inventory.
Kagutsuchi	The in-game moon phase.	Phase (1/8 to 8/8)	Affects which Fiend appears.

Practical Fiend Fusion Examples

Example 1: Fusing Matador

Matador is often the first Fiend players encounter and is a significant difficulty spike. Fusing him yourself requires precision.

• Inputs:
  • Demon Family: Yoma or Genma
  • Element: Any (e.g., Aeros)
  • Kagutsuchi: Phase 4/8 or 5/8
• Result: Fiend Matador. His Red Capote skill, which maximizes his evasion, makes him a powerful early-game ally. This is a vital matador fusion recipe.

Example 2: Fusing Daisoujou

Daisoujou is one of the most useful demons in the game due to his unique skill, Meditation, which drains enemy MP and HP.

• Inputs:
  • Demon Family: Night or Vile
  • Element: Any (e.g., Aquans)
  • Kagutsuchi: Phase 6/8 (Full) or 7/8
• Result: Fiend Daisoujou. His utility for sustaining your party through long dungeons is unmatched, a cornerstone of any good early game demon strategy.

How to Use This Nocturne Fusion Calculator

Using this tool is straightforward. Follow these steps to guarantee your desired Fiend fusion outcome:

1. Select Ingredient Family: Choose the demon race you plan to fuse from the “Ingredient Family” dropdown. Remember, only certain families can produce Fiends.
2. Select Element: Pick any of the four “Ingredient Element” demons. The specific element does not change the Fiend outcome, only the demon family does.
3. Set Kagutsuchi Phase: This is the most critical step. Use the slider to match the current in-game moon phase. The calculator will instantly update the result based on the phase. For a deeper dive, read our guide on understanding Kagutsuchi in Nocturne.
4. Review Result: The “Fusion Result” box will display the Fiend you will create. If it says “No Fiend Result,” it means the combination is incorrect for the selected Kagutsuchi phase.
5. Reset and Plan: Use the “Reset” button to start over and plan your next fusion for your compendium.

Key Factors That Affect Fiend Fusion

• Deathstone Presence: This is non-negotiable. If you do not have a Deathstone in your inventory, a Fiend fusion will not occur, and you’ll get a normal demon instead.
• Kagutsuchi Phase: The moon phase is the primary determinant of *which* Fiend you will get from a valid family pairing. The same fusion on a Full moon vs. a Half moon can yield completely different demons.
• Demon Family, Not Specific Demon: The fusion recipe calls for a *family* (e.g., Vile), not a specific demon from that family (e.g., Baphomet). Any demon of the correct family will work.
• Sacrificial Fusions: Fiend fusions cannot be performed as sacrificial fusions. It must be a standard two-demon fusion. Trying to sacrifice a third demon will override the Fiend recipe.
• Fusion Accidents: While Fiend fusion feels like a planned “accident,” true random fusion accidents can still occur, overriding the Fiend recipe. Saving before any important fusion is highly recommended. Understanding the mechanics behind a different game’s fusion system can highlight Nocturne’s unique quirks.
• Player Level: You cannot fuse a demon whose base level is higher than your main character’s current level. Even if you have the right ingredients for The Trumpeter, you cannot create him until you reach his level.

Frequently Asked Questions (FAQ)

Q: Why isn’t my fusion producing a Fiend?

A: The most common reasons are: 1) You are missing a Deathstone, 2) You are at the wrong Kagutsuchi phase, or 3) You are not using a valid demon family as an ingredient.

Q: Where do I get Deathstones?

A: Deathstones are commonly found in treasure chests throughout the Labyrinth of Amala and other late-game areas. They can also be dropped by certain demons.

Q: Does the Element demon’s level matter?

A: No. For Fiend fusions, the level of the Element demon (Aeros, Aquans, etc.) has no impact on the outcome.

Q: Can I use this calculator for normal fusions?

A: This specific tool is optimized as a **nocturne fusion calculator** for Fiends. For standard fusions, you would need a more comprehensive tool that accounts for the base levels and races of all demons.

Q: What does “Kagutsuchi Phase” mean?

A: It refers to the phase of the moon shown in the top-left of your screen. It cycles from New (8/8) to Full (6/8) and back. This calculator uses a numeric system where Full is 6/8 and Half is 3/8 or 4/8.

Q: Can I fuse The Trumpeter with this method?

A: Yes. The Trumpeter is one of the Fiends available through this fusion method. You will need to use a Tyrant family demon during the Full Kagutsuchi phase.

Q: Does skill inheritance work on Fiend fusions?

A: Yes, skill inheritance works as normal. The resulting Fiend will inherit a random selection of skills from the non-elemental demon used in the fusion.

Q: Is there a way to avoid fusion accidents?

A: No, fusion accidents are a random chance event in the game. The only way to guard against an unwanted accident is to save your game before performing any fusion. This is a core mechanic of the series, influencing even the Magatama you choose.