The First Descendant: Jayber Build & Best Loadout – Season 3 E2

Welcome to The First Descendant Jayber Build Guide for Season 3 Episode 2 Assemble.

In this guide, we will explain how to create a powerful build for the Jayber Descendant. We’ll cover how the skills work and which weapons, stats and modules you need to create the most powerful build for Jayber.

Table of Contents:

1. How to play Jayber
2. Jayber Builds Overview – Module
   1. Jayber Mobbing Build
3. Trigger & Ancestor Modules
4. Arche Tuning for Jayber
5. Jayber Equipment Overview
   1. Best Weapons for Jayber
   2. Best Reactor for Jayber
   3. Best External Components for Jayber
   4. Inversion Reinforcements
   5. All Jayber Transcendent Modules Explained
   6. Jayber Trigger Modules
6. Jayber Basics
   1. How to unlock Jayber
   2. Skills Explanation – Master Jayber’s Abilities
   3. Module Basics Explained!
   4. Best Grapple Hook for Jayber
7. Jayber’s Story

For builds on other Descendants, visit our The First Descendant Builds Database, or check out the Character Tier List or the Weapon Tier List. 

TFD Wiki: We have expanded Alcasthq with tfd.alcasthq.com, a Wiki & Database for anything related to The First Descendant. Use the Character Editor or the Weapon Editor to theorycraft and create builds yourself. Browse Descendants, Weapons, Leaderboard Loadouts or use the Compare Tool. There are plenty of other features you can check out, too!

Here is a quick list of the strengths and weaknesses of the Jayber Build for The First Descendant.

How to Play Jayber in the First Descendant

Jayber’s gameplay is focused on setting up turrets that deal damage. The Jayber Mobbing Build is optimized for any hard content that requires massive AOE damage.

Jayber’s Equipment: Make Or Break It!

To unlock Jayber’s full potential, you need the right Weapons, Reactors, and External Components:

• Weapons: You need to have a maxed-out weapon for Jayber to be effective. See the Best Weapons for Jayber section.
• Reactors: Selecting the right reactor stats can drastically improve the build. Check out the Best Reactors for Jayber section.
• External Components: These are critical for survivability. Properly configured, they double or triple your HP and DEF. Learn more in the Best External Components for Jayber section.

Building a top-tier The First Descendant Jayber Build requires not only the right modules but also optimized weapons, reactors, and components.

Best Jayber Builds Overview for The First Descendant

All Jayber build setups require an Energy Activator to increase the Module Capacity. We also have an in-depth guide on how to farm Energy Activators in The First Descendant. Additionally, you will need plenty of Kuiper Shards and Gold to increase Module Levels. Here are the Top 3 Kuiper Shard farm spots!

Equipment: I will cover Weapons, Reactors, and External Components in the Jayber Equipment section. To maximize the power of any build, you must get the correct items!

• How to get Modules: Read the Module Farming section.
• 85 Module Capacity How? Read the basics Module section.

Jayber Mobbing Build

• Jayber Mobbing Build Type: Used in any hard content that requires AOE damage.
• Jayber Mobbing Build Focus: Maximizes damage against groups of enemies with AOE damage.

The Jayber Mobbing Build is a non-crit-based setup. The Immediate Purge Code transcendent mod focuses on AOE damage over time. If you want more burst damage, swap it out with the Turret Engineering mod.

Jayber Mobbing Build Module Configuration Table

Module Slot	Module Name	Mod Level	Socket Type	Crystallized
0 (Trigger Module)	Power Beyond	N/A	N/A	N/A
1 (Skill Module)	Immediate Purge Code	Max	Almandine	No
2	Nimble Fingers	Max	Malachite	Yes
3	Multitalented	Max	Malachite	Yes
4	Maximize Conservation	Max	Malachite	Yes
5	Power Increase	Max	Malachite	Yes
6	Skill Extension	Base	Rutile	Yes
7 (Sub Module)	Mid-Air Maneuvering	Max	Malachite	Yes
8	Non-Attribute Amplification	Max	Malachite	Yes
9	MP Conversion	Max	Malachite	Yes
10	Skill Simplification	Max	Xantic	Yes
11	Dimension Amplification	Max	Malachite	Yes
12	Skill Expansion	Max	Rutile	Yes

Trigger and Ancestor Modules for the Jayber Build

Trigger and Ancestor Modules are also part of the module category, but they are a special type of module that are harder to unlock and acquire.

• Trigger Modules: Go into a special slot. Unlock special buffs and unique effects.
• Ancestor Modules: Go into a normal module slot. Enhance the build by adding additional stats.

Jayber Trigger Modules

You need to first unlock the trigger module slot for each character. Learn how to unlock Trigger Modules in The First Descendant.

For our The First Descendant Jayber Build, you always want to use the Power Beyond trigger module. This gives us a flat 15% Skill Power Increase to all our damage, which is very powerful.

• Mobbing & Bossing: Power Beyond

Jayber Ancestor Module

Ancestor Modules can be slotted once you have acquired them. However, they are only worth it once you have an Ancestor module with good stat rolls on them.

Jayber Ancestor Module: Tech Expert’s Resolution

It is only worth slotting an Ancestor Module if you have good rolls on it; otherwise, it isn’t worth it.

• Ideal Positive Rolls
  • Non-Attribute
  • Dimension
  • Duration
  • Cooldown
• Ideal Negative Rolls
  • Max Shield
  • DEF

Arche Tuning for Jayber

The Arche Tuning System in The First Descendant is important for every Character; it buffs your stats by a good amount.

You level up Arche Tuning in the Sigma Sector Dropoff Operation. Mutant Cells also drop there with a small chance.

For Jayber, we are going the right side and upper right side route.

Jayber Equipment Overview in The First Descendant

Equipment is the cornerstone of any successful The First Descendant Build. For Jayber, having the right setup can mean the difference between dominating content and falling short. This section breaks down the essential equipment types: Weapons, Reactors, External Components, and Transcendent Modules, and explains how they maximize his power.

Equipment Type	Importance	Key Benefits
Weapons	Only used as a “stat stick” to get extra sprint speed and grapple hook recharge.	Faster movement
Reactors	Essential for boosting skill performance. Jayber prefers cooldown and damage perks.	Enhances skill potency. Ensures Jayber’s abilities perform at peak levels.
External Components	Arguably the most impactful equipment. Dramatically improves survivability and utility. Set Buffs with 2/4 pieces.	Quadruples stats like HP or DEF. Adds utility like MP recovery. Enables effective performance in high-difficulty content. Core System Enhancements.
Inversion Reinforcements	Adds further buffs to your build.	Perks that can make a difference in build power.
Transcendent Modules	Unlocks advanced playstyles. Essential for specialized builds.	Significantly boosts skill efficiency and power.

Best Weapon for the Jayber Build in The First Descendant

Here you will find the Top 3 Weapons for Jayberin The First Descendant that I love to run.

Don’t forget to have the needed Reactor Optimization Condition with the correct weapon types, otherwise, your skills will deal much less damage!

Important: You want to pick a weapon with a high movement speed stat and (Precision Augmentation) to get 1x Sprint Speed and 1x Grapple Hook Recharge.

Top 3 Weapons for Jayber

Weapon	Movement Speed	Key Features	Why It’s Great for Jayber
Peace Maker	630	Highest Movement Speed in the game.	Highest Movement Speed Weapon and and 2x and 1x .
Malevolent	610	Max AoE Damage	One of the most powerful AoE weapons. Can easily finish off some enemies.
Thunder Cage	600	Good weapon for AoE damage. Sends shockwaves around when an enemy dies. Everyone has this weapon from the main story (easy accessible)	Easy to get and gets the job done. 1x and 1x .

You want the following Weapon Cores:

• Grapple Hook Recharge (Free Augmentation)
• Sprint Speed (Precision Augmentation)
• Sprint Speed (Precision Augmentation)

Best Reactor for Jayber in The First Descendant

Selecting the best reactor for Jayber in The First Descendant can significantly enhance his abilities, allowing you to maximize his effectiveness in various scenarios. Not only does the reactor determine your skill damage, but it also gives additional secondary benefits through modifiers.

How to find the Location of Reactors

Reactor drop locations change every day. Not many players know this and get confused. Now, there is a reactor search function in-game. Go to the map and press on Difficulty Level Rewards. In here, you can see where all the reactors currently drop.

Note: It is possible that not all reactor types are currently dropping. You have to come back and recheck every day.

If your specified reactor drops in an area, you go there and farm any missions and monsters (Preferably missions with lots of monster spawns). There will be plenty of reactors dropping from monsters all over the place, any monster works. It will take a while to get a good reactor!

Best External Components for the Jayber Build

Here is the best external component set that you want to run with Jayber:

• Jayber Mobbing Setup: Enlightened Mage Set 

Important substats that you want for the components, these are locked per component types:

• Enlightened Mage Auxiliary Power: MP Recovery Out of Combat & Max HP
• Enlightened Mage Sensor: Max MP & MP Recovery in Combat
• Enlightened Mage Memory: MP Recovery Modifier & DEF
• Enlightened Mage Processor: Any stats are fine.

External Component Cores: Always go with Max HP & DEF.

Inversion Reinforcements Setup for Jayber

You can find the Inversion Reinforcements in the inventory, located on the bottom left side. This changes with every new season and needs to be leveled up again. You level up Inversion Reinforcements by doing any activity. However, the fastest way to advance it is by completing Disrupt Invasion (max 4 daily) in the dungeon terminal with the red dungeons.

At max level, you have unlocked everything. While the last perk is always active in each row, you can only slot three additional perks at the bottom. Here is what you want to prioritize:

• Hunt: Pick Arche Circulation Tactic.
• Attribute: None.
• Recovery: Selective Neurostimulation.
• Survival: Deploy Hardened Shell.
• Season: None.

All Jayber Transcendent Modules Explained

Jayber has the following transcendent modules:

• Attacking Compulsion
• Immediate Purge Code
• Medical Compulsion
• Turret Engineering

Jayber Basics in The First Descendant

If it is your first time playing Jayber in The First Descendant, here are some useful things you should know.

1. How to unlock Jayber
2. Skills Explanation – Master Jayber’s Abilities
3. Module Basics Explained!
4. Best Grapple Hook for Jayber

How to Get Jayber in The First Descendant

Let’s take a quick look at how to unlock Jayber in the First Descendant. To unlock Jayber, you have to purchase him from the store, or research him. You need the following items to research Jayber:

• 1x Jayber Enhanced Cells
  • 303x Hellion
  • 455x Reverse Charging Coil
  • 34x Insulated Metallic Foil
  • 1x Jayber Enhanced Cell Blueprint
  • 200k Gold
• 1x Jayber Stabilizer
  • 363x Nanopolymers
  • 462x Shape Memory Alloy
  • 43x Balanced Plasma Battery
  • 1x Jayber Stabilizer Blueprint
  • 200k Gold
• 1x Jayber Spiral Catalyst
  • 292x Flectorite
  • 554x Carbon Crystal
  • 26x Thermal Metallic Foil
  • 1x Jayber Sprial Catalyst Blueprint
• 1x Jayber Code
  • Location 1: Agna Desert Hard – Abyssal Void Fusion Reactor – Agna Desert Miragestone Deposit
  • Location 2: Fortress Normal – Void Fusion Reactor  – Fortress Frozen Valley
  • Location 3: Sterile Land Hard – Abyssal Void Fusion Reactor – Sterile Land Restricted Zone
  • Location 4: White-night Gulch Hard – Abyssal Void Fusion Reactor – White-night Gulch Observatory
• 400k Credits

When you visit Magisters Anais at the Research Institute you can hover over each item. Then click on Acquisition Info and it will tell you where this specific item drops. You can also view in in-depth guide on How to unlock Jayber in The First Descendant.

The First Descendant Jayber Skills Explained

In this section, we are going to explain the skills available to our Jayber Build in the First Descendant, how each skill works and the best ways for you to use them.

Icon	Skill Name	Description
	Assault Turret	Summons an assault turret to attack the enemy. If enhanced, it launches attacks into nearby area.
	Medical Turret	Summons a medical turret to heal allies and distract enemies. If enhanced, it restores Mana.
	Multi-Purpose Gun	Changes gun to a Multi-Purpose Gun. If hit by a Multi-Purpose Gun, turret enters an enhanced state.
	Reactivate	Recalls all summoned turrets and inflicts powerful damage to nearby enemies. After using Total Recall, you enter Overhaul state, where turrets are summoned in their enhanced states.
	Turret Sync (Passive)	ATK increases when assault turret and medical turret are both summoned.

Assault Turret

Summons an assault turret to attack the enemy. If enhanced, it launches attacks into nearby area.

Assault Turret Skill Description:

• Non-Attribute – Dimension
• Summons an Assault Turret that attacks the enemy.
• The summoned turret’s stats are proportional to Jayber’s stats. It stays on the battlefield to attack enemies.
• When hit by the Multi-Purpose Gun, enters Enhanced state and creates a Damage Zone which deals continuous damage to nearby enemies.

How to use Assault Turret:

Place the Assault Turret down in a location where you expect to be fighting for a while. The turret will last for 12 seconds (base value) and attack nearby enemies for the duration. If possible, use the Multi-Purpose Gun to enhance the turret with extra damage output.

Medical Turret

Summons a medical turret to heal allies and distract enemies. If enhanced, it restores Mana.

Medical Turret Description:

• Non-Attribute – Dimension
• Summons a Medical Turret. The turret stays on the battlefield and restores the HP of nearby allies.
• When enhanced, a Taunt zone is created, affecting enemies within range.
• The summoned turret’s stats are proportional to Jayber’s stats, and the turret becomes enhanced when hit by the Multi-Purpose Gun.

How to use Medical Turret:

Medical Turrets can be placed to heal you and your allies. Place them close to enemies and enhance them with the Multi-Purpose Gun to make the turret Taunt enemies, forcing them to attack the turret instead of you and other players.

This skill has a rather long cooldown of 45 seconds, so try to be careful with the timing and placement to avoid wasting it.

Multi-Purpose Gun

Changes gun to a Multi-Purpose Gun. If hit by a Multi-Purpose Gun, turret enters an enhanced state.

Multi-Purpose Gun Description:

• Non-Attribute – Singular
• Switches Jayber’s weapon to a Multi-Purpose Gun.
• Firing the Multi-Purpose Gun at a normal turret enhances it.
• Firint the Multi-Purpose Gun at a turret that is already Enhanced restores the turret and increases its duration.
• Firing the gun at the enemy deals damage. Cooldown depends on the number of bullets fired.

How to use Multi-Purpose Gun:

While the Multi-Purpose Gun can be used to attack enemies, we recommend using to enhance your turrets, as you’ll get much better value this way. Enhance your damage turrets and medical turrets to increase their effectiveness in combat.

Reactivate

Recalls all summoned turrets and inflicts powerful damage to nearby enemies. After using Total Recall, you enter Overhaul state, where turrets are summoned in their enhanced states.

Reactivate Description:

• Non-Attribute – Singular
• Retrieves all summoned turrets.
• Upon retrieval, fires multiple fragments nearby to deal AoE damage.
• Using Reactivate gains Overhaul for a period of time, allowing you to summon turrets as Enhanced turrets.

How to use Reactivate:

Used correctly, Reactivate makes Jayber simpler to play and more versatile, since you don’t need to spend as much time “setting up” your turrets and enhancing them in a new location.

Use Reactivate to pack up your turrets at the end of a fight, and as long as you start the next engagement within 30 seconds, your new turrets will already be enhanced at the start of a fight. You can then use the Multi-Purpose Gun to add duration to your enhanced turrets.

Turret Sync (Passive)

ATK increases when assault turret and medical turret are both summoned.

Turret Sync Passive Description:

• Non-Attribute
• When an Assault Turret and a Medical Turret are both summoned, gain Turret Sync.
• Turret Sync increases Jayber’s ATK.

How to use Turret Sync:

Turret Sync is a passive skill, which means it is always active. Keeping this passive in mind, it is highly recommended to have both turret types active as often as possible when you are in prolonged combat. This improves your Firearm ATK and Skill Power by 20%, which is a boost that’s simply too good not to have.

How Modules Work in The First Descendant

Modules are the bread and butter of all The First Descendant Builds. There are a few important things to remember about modules. This is for both Descendant and Weapon Modules.

While most builds require you to increase Module Capacity with an Energy Activator (you get two for free), they won’t require you to reduce the Module cost with Crystallization Catalyst. However, if you want to truly min-max a build, you will need plenty of these Catalysts.

1. How to increase your Module Capacity
2. Module Levels and Cost
   1. Kuiper Shards & best way to farm!
3. Reduce the cost of Modules
4. How to farm Modules

How to Increase Module Capacity

You get a base of 45 Modules for every Descendant character. And you can increase this up to 85 currently. First off, always slot a Sub Attack Module (Slot 7). When you increase this to the max level you will get an additional 10 Module Capacity. if you use a Crystallization Catalyst on the Sub Attack Module, you even get 15 extra slots. You will see this in the setup below.

Additionally, you can use an Energy Activator to increase your Module Capacity by another 20. However, these are fairly hard to farm, only use them on your best Descendants.

Lastly, increasing your Mastery Rank will also increase Module Capacity. Rank 1 gives you 25 Module Capacity, Rank 20 gives you 50 Module Capacity. That is how we reach the 80 Module Capacity that you see on most builds.

1. Slot a Sub Attack Module (and max it out to get +10 capacity, crystallize it for +15)
2. Use an Energy Activator (2o extra capacity)
3. Increase Mastery Rank (25 base capacity, max 50)

Weapons: Basically the same, but because you don’t have Subattack Modules, the Energy Activator gives you 30 instead of just 20 extra capacity.

You can also read my in-depth guide on how to increase Module Capacity in The First Descendant if you need more information. Or my Best Energy Activator Farm Spots and our Best Crystallization Catalyst Farm Spots. I tested all of the grind spots by myself and have already farmed plenty of these items with this method.

Module Levels and Cost

Modules can be enhanced (leveled up) with Kuiper Shards in The First Descendant. Enhancing Modules increases their power. At higher levels, the power will increase way more than at lower levels. Therefore it is always recommended to max out the most important Module first.

Here is an example of a must-have Module called Increased HP for our Descendant. You will notice that we start at 22%, but at the max level, we get a whopping 218.5% increase in health!

Transcendent Modules are the exception; they decrease Capacity Cost with higher levels!

For an in-depth overview, please visit our How to Level Up Modules in The First Descendant guide.

How to Farm Kuiper Shards

Kuiper Shards are used to level up Modules. We have a guide on the Top 3 Kuiper Shard Farming Locations in the First Descendant. We explain how to most efficiently farm Kuiper Shards (300-500k/hour) and show the amount you need to level up mods. As a summary, to max out a Module you need:

• Normal Modules: 103’100 Kuiper Shards
• Rare Modules: 206’200 Kuiper Shards
• Ultimate Modules: 309’300 Kuiper Shards
• Transcendent Modules: 515’500 Kuiper Shards

Always max out the most important Modules first, we will showcase the order below.

How to Reduce the Cost of Modules

To reduce the cost of Modules you need Crystallization Catalysts in The First Descendant. These require a lot of time investment. If you want to completely min-max you need to get plenty of them as technically, every slot can have a specific socket type to half the cost.

Modules have Socket Types. Our Increased HP Module has the Cerulean Socket Type.

• Module: Increased HP
• Socket Type: Cerulean

This is important because if we place our Increased HP Module in the fitting Socket Type, it will half the cost of the Module!

How to farm Modules in The First Descendant

Most The First Descendant Modules can be acquired fairly easily, but the higher-quality ones (Ultimate, Transcendent) are more tedious to obtain. Here is the easiest process to farm Modules quickly.

Open Map > Swap to Access Info > Select Modules

Here, you can find all Modules and their drop locations. If a module drops from several locations, it is recommended to select drop locations with higher drop chances.

There isn’t really much more to this. Simply check the location and go farm. Normal and Rare quality Modules have 30-50% drop chances in most cases. Ultimate ones range around the 5% mark and Transcendent ones can be a tough cookie with around 2% drop chance.

Smooth Grapple Hook for your Jayber Build

Using the standard Grapple Hook in The First Descendant can be a pain, and it feels kinda frustrating at times. Don’t worry, there is a way better alternative that will make it a joy to use the grappling hook!

It is called the Mid-Air Maneuvering Sub Module. I use this on all my The First Descendant Builds because it improves grappling by so much.

With this Module, you can attach your Grapple Hook to anything, even air! That means you can simply aim towards the sky and Hook up your grapple hook there for guaranteed fast movement!

Here is a guide on how to get the Mid-Air Maneuvering Sub Module in The First Descendant. It won’t take a lot of effort, but it will improve your build and overall gameplay in The First Descendant.

Jayber’s Story in The First Descendant

A utility-type dealer who uses turrets. Summons turrets for assault and recovery, respectively.

Are geniuses born or made? A natural engineer, there are many hypotheses about the origin of Jayber’s ability to wield Arche specialized in electronic warfare.

One hypothesis claims that the infectious disease he suffered during his childhood stimulated his cerebral cortex, leading to a dramatic increase in intelligence. Another one claims that the drug administered to treat the infectious disease was actually an experiment conducted by the Magisters to mass produce Arche.

Despite the unfounded rumours that continue to go around to this day, he himself had no desire to learn the truth. The reason being, as merely a unit in the war, the origin of his ability was unimportant to him.

For Jayber, who was born in the infectious disease isolation ard, the life support device that let him sleep comfortably and sang nursery rhymes to him was practically his parent. Jayber grew up having a deep connection with this life support device.

When he turned 10 years old, he was able to modify the device himself to connect to an external network and study the world. The moment Jayber connected to the real world, he was able to understand why the life support device was against connecting to the network.

The world was not the happy place that Jayber had dreamed of. It was constantly being plagued by invaders called the Vulgus and threatening entities called the Colossi. He was raised by the Magisters to become a weapon of war, a Descendant with the power of Arche, to combat these threats.

After coming into contact with reality, Jayber gave up on his hoped and dreams; instead, he began to think of himself as a necessary unit for war. Even after becoming an official Descendant, this attitude did not change, and his teammates were no fans of this Descendant who was no different from a machine. However, none of this mattered to Jayber. Geniuses are neither born nor made. Because they, too, are just a unit.

Related Guides for The First Descendant

You can also check out our Ultimate Weapons Database for The First Descendant or the Builds Database for The First Descendant.