Best FrostWatcher Build for Season 3 – The First Descendant

by JFFK · October 1, 2025

Welcome to The First Descendant FrostWatcher Build. This FrostWatcher Build is updated for Season 3.

This FrostWatcher build is optimized for the Haily Build – The First Descendant. The weapon is best used with her due to her 3rd skill. This weapon is currently underperforming heavily compared to other options.

Table of Contents:

You can also view our All Ultimate Weapons in The First Descendant list.

FrostWatcher Summary

The FrostWatcher is an Ultimate Scout Rifle.

Name: FrostWatcher
Type: Scout Rifle
Bullets: Impact Rounds
Tier: Ultimate
Unique Ability: Subzero Watcher

Unique Ability “Subzero Watcher”

On landing a Critical Hit on an enemy at a certain distance, the unique ability Cold Surveillance is applied to the target. Hitting the Weak Point of an enemy at a certain distance grants self the unique effect Subzero Sensation. Defeating an enemy grants self the unique effect Chill Synchronization. While Chill Synchronization is active, ignores the Movement Speed reduction by Hailey’s Cold Fury.

FrostWatcher Build for The First Descendant

Next, let us take a look at an optimized FrostWatcher Build for The First Descendant.

Here is all the info you need to create a powerful FrostWatcher Build:

Note: High-Level Weapon Cores boost your weapons’ damage numbers into insanity. Make sure to get weapon cores as soon as possible!

FrostWatcher Modules

FrostWatcher Module Configuration Table
Module Slot	Module Name
1	Rifling Reinforcement
2	Action and Reaction
3	Fire Rate UP
4	Better Insight
5	Chill Enhancement
6	Refrigerate Gunbarrel
7	Insight Focus
8	Charge Amplification
9	Multi-Trigger Rifling
10	Multi-Piercing Rifling

Weapon Readjustment

You can use the Weapon Readjustment at the Weapon Workbench in Albion. Here are the best Weapon Readjustments for the FrostWatcher:

Firearm ATK
Chill ATK
Multi-Hit Damage
Firearm Critical Hit Damage

Try to upgrade the Weapon Readjustments to at least purple quality.

Weapon Cores

Weapon Cores juice up your damage quite tremendously. However, especially the later-level Weapon Cores are difficult to get. So start with whatever weapon cores you have available. Weapon Cores drop in the Void Erosion Purge endgame activity.

Higher level Weapon Cores drop in the higher level Void Erosion Purge levels in The First Descendant. However, you can gradually work towards the highest level. I recommend trying to get to level six as soon as possible, since it won’t require clearing many stages and will already increase the power of your weapon tremendously.

Best Weapon Cores for the FrostWatcher:

Chill ATK (Free Augmentation)
Firearm ATK (Firearm Augmentation)
Chill ATK (Attribute Augmentation)
Fire Rate (Tactical Augmentation
Flex (Special Augmentation)

FrostWatcher Lore

This scout rifle, dubbed Frost Watcher, was a standard-issued weapon, designed to allow ordinary soldiers to operate the Chill Arche catalyst device attached to the weapon.

However, the Chill Arche infused in the weapon was too dangerous for ordinary soldiers to handle, as the skin of soldiers who touched the gun with their bare hands would instantly peel off. Even when used with specially treated gloves, frostbite was a common problem.

Moreover, even Descendants, who have Arche, found the gun too much to handle. Since the Chill Arche would course through their bodies, slowing their movements, only a handful of Descendants in Albion could handle the Frost Watcher properly.

But to those able to handle it, despite all of that, the Frost Watcher delivers deadly power. The bullets fired from this rifle passes through a specially forged barrel and when it comes into contact with the Chill Arche, it is transformed into a massive ice pick as sharp as a needle, which then attacks the enemy.

If the opponent is far away, the ice pick will get even sharper, digging into enemy’s flesh and maximizing the effectiveness of the next bullet that makes contact. In effect, it turns the user into a callous watcher of the frost, observing the enemy’s demise with an icy gaze.