Abyss Core Synthesis Guide

Overview

The Abyss Core Synthesis system is one of the most important endgame mechanics in Crimson Desert. It allows players to combine Abyss Gear at Witch workshops to create higher-tier versions of their equipped cores, or to gamble for powerful Greater Abyss Gears through Special Synthesis. Understanding how synthesis works is essential for building an optimized loadout, as the difference between a Tier I core and a Greater core can completely transform a character's combat effectiveness.

There are two distinct synthesis systems available at Witch NPCs: Regular Synthesis and Special Synthesis. Regular Synthesis is deterministic and safe, always producing a known result. Special Synthesis is a gamble that consumes both input gears for a randomly rolled outcome, but it is the only reliable path to obtaining Greater Abyss Gears. Both systems play a critical role in endgame progression, and knowing when to use each one is the key to building the strongest possible gear set.

Prerequisites

Before you can begin synthesizing Abyss Gears, you need to meet several requirements. The synthesis menu becomes available after you unlock your first Witch during the main story, and you will need a steady supply of Abyss Gears to feed into the system.

Unlocking Witches

Witches are the only NPCs that offer Abyss Gear crafting and synthesis. The first Witch you encounter is Sylvia (the Hermit Witch), unlocked during Chapter 3. The next Witch is Elowen (the Witch of Wisdom), who is unlocked during Chapter 5 as part of the main quest "The Missing Seal." After meeting Elowen, you can seek out the remaining Witches by completing specific side encounters across the world.

All Witches except Sylvia offer the "Craft Abyss Gear" menu, which includes both Regular and Special Synthesis tabs. You can visit any crafting Witch for synthesis; there is no restriction on which Witch you use. However, different Witches sell different blueprints for Regular Synthesis, so you may need to visit multiple locations to find the one you need.

Gathering Abyss Gears

You will need a large supply of Abyss Gears to fuel the synthesis process, especially for Special Synthesis where both input gears are consumed every attempt. The primary sources of Abyss Gears are:

• Abyss Sanctums: The primary source. Clear Sanctum rooms to earn Abyss Cells that can be crafted into gears.

• Enemy drops: Certain boss enemies and elite mobs drop Abyss Gears directly.

• Spire of Frost: A repeatable dungeon that drops both Fortitude and Bane-type gears, which are excellent synthesis fodder.

• Root's End Ruins: Located in Hernand near Sage's Peak. Offers an infinite farming loop for Destruction I and Insight I cores.

• Special Equipment Challenges: Completing weapon-specific challenges can reward unique and Greater Abyss Gears.

• Contribution Shop: Some gears can be purchased with Contribution points. Be careful to remove all Abyss Gears from armor before selling equipment back to the shop, or you will lose the socketed cores permanently.

One of the most efficient sources is the shield bash disarm method at Frost Hold Pass near the Spire of Frost. Frost knights there drop the Frozen Soul (one-handed weapon) and Frostborn Shield, which extract into Malicious Bane and Guard Stamina respectively. These two gears fit into separate synthesis slots, making them an ideal pairing for immediate synthesis. Do not clear the camp; instead, disarm enemies, collect the drops with your companion, and fast travel away to reset. A single session can yield 20 or more tier 1 gears ready for synthesis.

Abyss Gear Categories

Crimson Desert features 24 distinct Abyss Gears organized into five main categories. Understanding these categories is important for synthesis because Special Synthesis requires two different gears as input, and the resulting gear is randomly selected from the full pool.

Each gear comes in multiple tiers: Tier I, Tier II, Tier III, and Greater. Higher tiers provide stronger bonuses. For example, Destruction I gives Attack +1, Destruction II gives Attack +2, and Destruction III gives Attack +3, while Greater Destruction provides the highest possible Attack bonus. The gap between a single Greater gear and a standard Tier I core is enormous; a single Greater core in one socket can outweigh filling three sockets with Tier I versions.

Regular Synthesis

Regular Synthesis is the straightforward, deterministic upgrade path. It combines two identical Abyss Gears of the same type and tier into one gear of the next tier. For example, combining two Destruction I cores produces one Destruction II core.

How Regular Synthesis Works

1. Visit any Witch with crafting capabilities (Elowen, Bari, Lyselia, Areciel, or White Crow).

2. Open the "Craft Abyss Gear" menu.

3. Select the gear you want to upgrade. You must own the corresponding blueprint for that gear type.

4. Two copies of the same gear at the same tier are consumed to produce one gear of the next tier.

5. The result is guaranteed. There is no randomness in Regular Synthesis.

Blueprint Requirements

Regular Synthesis requires a blueprint for each gear type you want to upgrade. Blueprints are purchased from Witches through their shop menu. Different Witches sell different blueprints, so you may need to visit multiple Witch locations to collect them all. Once purchased, a blueprint is permanent and can be used for unlimited synthesis attempts of that type.

Material Costs

Because each tier requires two copies of the previous tier, the material cost scales exponentially:

This exponential scaling means that reaching Tier III for a single gear slot requires farming four copies of the base Tier I core. For a full set of Tier III gears across all equipment slots, the farming requirement is substantial. This is why efficient Abyss Gear farming locations like Root's End Ruins are so valuable.

Special Synthesis

Special Synthesis is the gambling mechanic at the heart of the endgame gear progression. Unlike Regular Synthesis, it produces a random result and is the only reliable method for obtaining Greater Abyss Gears. It does not require blueprints, making it accessible as soon as you have two compatible gears and a Witch with crafting services.

How Special Synthesis Works

1. Visit any crafting Witch and open the "Craft Abyss Gear" menu.

2. Press R2 (PlayStation) or RT (Xbox) to switch to the Special Synthesis tab.

3. Place an Abyss Gear in the first slot. This is the gear you are sacrificing.

4. Place a second Abyss Gear in the second slot. The UI defaults to Steelbane, but you can swap it to any compatible gear in your inventory.

5. Confirm the synthesis. Both input gears are consumed and destroyed.

6. A new random Abyss Gear is generated. The type, tier, and effect are all rolled at the moment of crafting.

You can queue up to 20 fusions at once in a single batch, which speeds up the process considerably when you have a large stockpile of materials.

The Steelbane Misconception

When you first open the Special Synthesis menu, the second slot automatically shows Steelbane as the default selection. Many players mistakenly believe they need to find Steelbane before they can use Special Synthesis. This is not the case. You can select the second slot and swap it to any compatible Abyss Gear in your inventory. Steelbane I and II are actually better used as synthesis fodder anyway, since their socketed resistance bonus is relatively small. Steelbane III and Greater Steelbane, on the other hand, provide stronger resistance bonuses and are worth keeping for defensive builds.

Tier System and Probabilities

The outcome of Special Synthesis is determined by a probability roll at the moment of crafting. Community testing and datamining have established the approximate odds for each possible outcome:

Critical insight: The 4% chance of rolling a Greater result is the same regardless of the tier of materials you feed into the synthesis. Using two Tier I gears, two Tier II gears, or two Tier III gears as input all yield the exact same 4% probability of producing a Greater. This has an extremely important practical implication: you should always use Tier I gears for Special Synthesis attempts targeting Greater results. Tier I gears are the cheapest and fastest to farm, and since the odds are identical, using higher-tier gears as input is a waste of resources.

The only reason to use higher-tier input gears is if you specifically need a Tier II standard result, in which case the ~46% chance from Special Synthesis may be more efficient than farming four Tier I copies for the Regular Synthesis path. However, for the most part, the optimal strategy is to stockpile Tier I gears and mass-synthesize them in batches of 20.

Level 2 Synthesis Probabilities

When you combine two Tier 2 Abyss Gears via Special Synthesis, the probability distribution shifts in your favor:

The key takeaway is that Level 2 synthesis gives you a 46% chance of obtaining a Tier 3 gear, compared to the 46% chance of Tier 2 from Level 1 synthesis. The 4% Greater chance remains constant regardless of input tier. With 20 gears from a single Frost Hold farming session, you can run 10 synthesis attempts and statistically expect to produce four to five Tier 2 results from Level 1, then use those for Level 2 synthesis to push toward Tier 3.

Greater Abyss Gears and Durability

Greater Abyss Gears are the most powerful cores in the game, offering dramatically higher stat bonuses than their Tier III counterparts. However, they come with an important trade-off: Greater gears have durability. Once a Greater gear's durability reaches zero, the item is destroyed and permanently removed from your equipment. This makes Greater gears temporary consumable upgrades rather than permanent additions to your build.

Because of the durability system, many experienced players prefer to fill their permanent loadout with Tier III gears and reserve Greater gears for specific challenging encounters. For example, socketing Greater Destruction and Greater Malicebane before a difficult boss fight provides a substantial damage boost for that encounter, while your permanent Tier III gears handle everyday exploration and farming.

This durability system is controversial among the community. Some players feel it devalues the 4% synthesis gamble, since the reward is temporary. Others appreciate it as a resource sink that keeps the endgame farming loop engaging. Regardless of your opinion, planning around durability is an essential part of endgame gear management.

Synthesis Tier and Greater Gear Yield

The tier of the input materials affects how many greater gears you receive when the 4% roll succeeds. Tier 1 synthesis creates 1-2 greater gears, Tier 2 creates 3-4, and Tier 3 creates 5-6. Because higher-tier inputs are more expensive to farm, most players target Tier 1 or Tier 2 synthesis and rely on save scumming to hit the 4% chance repeatedly rather than investing in Tier 3 inputs for marginally more greater gears per success.

The recommended approach is to save before initiating special synthesis rather than after. If the synthesis produces an unwanted greater gear (or no greater gear at all), reload the save. The result is fully randomized at the moment of crafting, so each reload gives a completely independent roll. This means you can fish for specific greater gears like Greater Destruction or Greater Infinite Arrows without wasting materials.

Save Scumming Strategy

Because Special Synthesis results are rolled at the moment of crafting, the game's manual save system can be exploited to guarantee favorable outcomes over time. This technique, commonly called save scumming, is widely used by the community and is considered the most efficient way to target specific Greater Abyss Gears.

Step-by-Step Save Scumming Method

1. Manual save before visiting the Witch. Make absolutely sure you save before initiating any synthesis.

2. Open the Special Synthesis menu and queue up your batch of gears (up to 20 at once).

3. Confirm the synthesis and review the results.

4. If you receive a Greater Abyss Gear you want, save again to lock in the result.

5. If the results are disappointing (all Tier I and Tier II with no Greater), reload your save and try again.

6. Repeat until you get the desired outcome.

Because the second slot gear is consumed on each attempt, reloading your save also restores the consumed materials. This means save scumming effectively lets you attempt Special Synthesis an unlimited number of times with a fixed supply of gears. With approximately a 4% chance per synthesis, you can expect to see a Greater result roughly once every 25 attempts on average. A batch of 20 fusions gives you around a 56% chance of getting at least one Greater gear in that batch.

Important Notes on Save Scumming

• The result is generated at the moment you confirm the synthesis, not when you open the menu. Reloading and attempting again will produce different results.

• Always use manual saves, not autosaves. Autosaves may overwrite your pre-synthesis checkpoint.

• Keep track of which Greater gears you need so you do not accidentally save over a good result while chasing a specific type.

• This technique works for both single syntheses and batch queues of up to 20.

An important nuance: the best time to save is before opening the special synthesis menu, not after selecting materials. If a greater gear triggers unexpectedly and you wanted a different type, you cannot undo it without a pre-synthesis save. Some players intentionally avoid triggering greater gears on certain attempts (since greater gears have limited durability), preferring to accumulate standard Tier III gears for their permanent loadout and only targeting greater gears for specific boss encounters.

Optimal Progression Path

The most efficient approach to building a powerful gear set combines both Regular and Special Synthesis in a structured progression. Here is the recommended path from early game to endgame:

Phase 1: Early Game (Chapters 5 Through 8)

• Unlock Elowen during Chapter 5 and begin socketing any Tier I gears you find into your equipment.

• Focus on collecting Destruction I and Insight I cores from combat encounters and early Sanctums.

• Socket Spirit or Stamina Transference into armor slots to sustain aggressive combat.

• Do not synthesize yet. Stockpile duplicate gears for later.

Expedition tip: As soon as you discover the Abyss Debris location near Tash Calp (defeat the enemy inside to unlock it), send an expedition team of 10 Greymanes. The expedition returns every four in-game days with abyss gear that can be Tier 3 or higher, sometimes yielding multiple pieces per return. Similarly, the Timeworn Ruins expedition returns base abyss artifacts every three in-game days. Start both expeditions as early as possible since they run passively in the background while you farm other sources.

Phase 2: Mid Game (Chapters 9 Through 12)

• Unlock additional Witches (Bari, Lyselia, Areciel) to access more blueprint types.

• Buy blueprints for Destruction, Insight, Gale, and Fortitude.

• Use Regular Synthesis to upgrade your core combat gears from Tier I to Tier II.

• Begin farming Spire of Frost for Fortitude and Bane-type gears to build synthesis stockpile.

• Start your first Special Synthesis attempts with excess Tier I gears you do not plan to Regular Synthesize.

Phase 3: Late Game and Endgame

• Farm Root's End Ruins or other repeatable locations for mass quantities of Tier I cores.

• Use Regular Synthesis to push essential gears (Destruction, Gale, Fortitude) to Tier III for your permanent loadout.

• Use Special Synthesis with Tier I fodder gears to gamble for Greater Abyss Gears. Save scum aggressively.

• Target Greater Destruction, Greater Malicebane, and Greater Gale as priority results for boss encounters.

• Keep a rotating stock of Greater gears for difficult content while your permanent slots stay filled with Tier III.

• Unlock the White Crow by completing all Witch Sanctum puzzles for access to the fifth crafting Witch.

Progression Summary

Notable Abyss Gears for Synthesis

Not all Abyss Gears are equally valuable. Some are worth pushing to Tier III via Regular Synthesis for permanent use, while others are best used as Special Synthesis fodder. The following breaks down the most important gears and their recommended synthesis path:

Equipment Slot Interactions

One of the most important (and least intuitive) aspects of the Abyss Gear system is that certain stats only apply based on which equipment slot the gear is socketed into. Getting this wrong can waste valuable cores on slots where they have no effect.

The Gloves and Boots Rule

Offensive Abyss Gears like Destruction (Attack) and Insight (Critical Hit Rate) socketed into gloves and boots only activate during unarmed combat. If you are wielding any weapon (sword, greatsword, bow, etc.), the Attack and Crit bonuses from gloves and boots will not appear on your stat sheet and will have no effect on your damage output. The moment you switch to Unarmed as your active weapon, those stats immediately take effect.

The exception: Attack Speed (Gale) and Movement Speed (Haste) gears in gloves and boots do work regardless of your equipped weapon. This is an important distinction. If you are using a slow weapon like a greatsword, socketing Gale into your gloves and boots is a legitimate way to boost your swing speed.

Recommended Socket Layout

Fortification (Fortitude) is particularly efficient in armor slots because its defense bonus stacks across all armor and shield sockets. Loading every defensive slot with Fortitude cores is the most straightforward way to build high defense.

Best Gears for Different Builds

Your ideal Abyss Gear loadout depends heavily on your weapon choice and playstyle. Below are recommended setups for common build archetypes.

Greatsword Build

Greatswords are slow but hit extremely hard. The primary weakness is attack speed, which Abyss Gears can directly address.

• Weapon sockets: Destruction III, Insight III, Malicebane (for boss fights)

• Armor sockets: Gale III in chest, gloves, and boots (attack speed stacks and applies to greatsword swings)

• Shield sockets: Fortitude III, Aegis

• Greater targets: Greater Destruction, Greater Gale, Greater Malicebane

One-Handed Sword Build

Swords are already fast, so the focus shifts to raw damage and critical hits.

• Weapon sockets: Destruction III, Insight III, Momentum

• Armor sockets: Fortitude III, Spirit, Stamina Transference

• Shield sockets: Fortitude III, Aegis

• Greater targets: Greater Destruction, Greater Insight

Bow/Archer Build

Bow builds live or die by the Infinite Arrow gear, which at Tier III provides +60% chance to not consume arrows. Paired with a Tier II version, you reach +100% and never run out.

• Bow sockets: Infinite Arrow III + Infinite Arrow II (100% arrow conservation), Destruction

• Armor sockets: Fortitude, Haste (mobility for kiting), Gale

• Greater targets: Greater Infinite Arrow, Greater Destruction

Tank / Defensive Build

Focuses on surviving heavy hits, especially useful for boss encounters that can one-shot underarmored players.

• Weapon sockets: Spirit, Stamina Transference, Destruction

• Armor sockets: Fortitude III in every slot, Aegis, Vigor

• Shield sockets: Fortitude III, resistance gears matching the encounter (Frostward, Flameward, Thunderward)

• Situational: Petrification Immunity gear for bosses that inflict Petrify status

• Greater targets: Greater Fortitude, Greater Aegis

Farming / Utility Build

Optimized for resource gathering, Contribution grinding, and open-world exploration rather than combat.

• Armor sockets: Contribution XP (boost Contribution leveling), Haste (movement speed), Pickpocket (bonus items)

• Weapon sockets: Spirit, Stamina Transference (sustain for clearing mobs)

• Quality of life: Gourmet III for +15% food healing, reducing potion consumption

• Greater targets: Not a priority for farming builds; Tier III is sufficient

Tips and Optimization

• Always save before Special Synthesis. This cannot be overstated. The ability to reload and retry is the single most powerful tool in the synthesis system.

• Use Tier I gears for Special Synthesis. The 4% Greater chance is identical regardless of input tier. Never waste Tier II or Tier III gears on Special Synthesis unless you have a specific reason.

• Batch your Special Synthesis attempts. Running 20 fusions at once gives you better statistical odds of hitting at least one Greater and saves real-world time.

• Farm Root's End Ruins. The infinite loop at Root's End Ruins in Hernand is the most efficient way to stockpile Destruction I and Insight I cores for synthesis fodder.

• Do not sell Contribution Shop gear with cores. Always remove all Abyss Gears from armor before selling equipment to the Contribution Shop. Socketed cores are lost permanently if you sell the equipment with them still attached.

• Save Greater gears for hard content. Because Greater gears have durability and will eventually break, use them strategically for boss encounters rather than during routine exploration.

• Prioritize Tier III for your permanent loadout. Tier III gears are permanent and provide strong bonuses. Build a full Tier III set before investing heavily in Greater gear gambling.

• Steelbane I and II are perfect fodder. Their socketed resistance bonus is negligible, making them ideal sacrificial material for the second slot in Special Synthesis.

• Check your slot before socketing. Remember that Destruction and Insight in gloves/boots only work for unarmed combat. Socket Gale, Haste, or Fortitude in those slots instead.

• Unlock all five Witches. Each Witch sells different blueprints, and having access to all crafting locations gives you the most flexibility. Complete the Sanctum puzzles to unlock the White Crow for the fifth workshop.

• Ator's Orb pairs well with Critical gears. The stagger mechanic benefits from high crit rate, so combining Insight gears with Ator's Orb and Ground Surge can create devastating stagger combos against bosses.

• Movement Speed gears (Haste) are underrated. The speed boost during exploration and combat repositioning is significant and makes world traversal noticeably smoother.

See Also

• Abyss Gear: Full list of all Abyss Gears and where to find them

• Witches of Pywel: Locations and services of all five Witches

• Abyss Artifact: Powerful artifacts obtainable through the Abyss system

• Bosses: Boss encounters where Greater Abyss Gears are most valuable

• Builds: Build guides and weapon loadout recommendations

• Weapons: Weapon types and their Abyss Core socket counts

• Armor: Armor sets and defensive socket configurations