The First Descendant how to farm Pure Energy Residue

✓ At a glance

• Pure Energy Residue can only be found in the Fortress region and is used in research components for several Descendants.
• The best way to farm Pure Energy Residue is by unlocking Encrypted Vaults, as they provide the highest chance of getting it.

It’s easy to spot that you’re going to have to farm a lot of materials in TFD. The game is rife with plenty of different resources, which are then used to research various upgrades and characters. One of the sought-after resources i Pure Energy Residue and we’ll explain how and where to farm it.

How to get Pure Energy Residue

You can only get Pure Energy Residue in the Fortress region of the game. It drops from a few main sources, most notably from the Encrypted Vaults that you manage to unlock, and as a random drop from monsters during missions in the region.

Notably, the resource can drop from both Normal and Hard difficulties, so both can be used to farm it up. These are the main sources that you can use:

• Fortress – Precise Encrypted Vault (Normal and Hard)
• Fortress – Ultraprecise Encrypted Vault (Normal and Hard)
• Fortress – Precise Encrypted Vault (Normal and Hard) with Enzo required
• Fortress – Ultraprecise Encrypted Vault (Normal and Hard) with Enzo required
• Fortress – Outlying Communications Facility (Normal and Hard) mission random monster drop
• Fortress – Snowy Heights (Normal and Hard) mission random monster drop
• Fortress – Gate System Control Network (Normal and Hard) mission random monster drop
• Fortress – Munitions Loading Dock (Normal and Hard) mission random monster drop
• Fortress – Command Relay (Normal and Hard) mission random monster drop
• Fortress – Ship Charging Facility (Normal and Hard) mission random monster drop
• Fortress – Frozen Shipyard (Normal and Hard) mission random monster drop
• Fortress – Giant Hangar (Normal and Hard) mission random monster drop
• Fortress – High-Thermal Source Detected Zone (Normal and Hard) mission random monster drop
• Fortress – Central Control Unit (Normal and Hard) mission random monster drop
• Fortress – Destroyed Base (Normal and Hard) mission random monster drop
• Fortress – Explosive Debris (Normal and Hard) mission random monster drop
• Fortress – Fortress Command Entrance (Normal and Hard) mission random monster drop
• Fortress – Heart of the Fortress (Normal and Hard) mission random monster drop
• Fortress – Quarantine Zone (Normal and Hard) mission random monster drop

Best way to farm Pure Energy Residue

There are plenty of ways to get Pure Energy Residue, but the best way to farm them is by looting Encrypted Vaults. Make sure to have Code Analyzers on hand and spend some time looking for them. They provide the best chance of getting what you need.

Otherwise, if you’re farming other materials too, for example, it might be a better idea to run missions. That way, you at least have a random chance of getting them. But this method is in no way optimal and depends on you seeking other resources in addition to Pure Energy Residue.

What is Pure Energy Residue used for?

Pure Energy Residue is used to research several important components. For instance, it’s an important part to get the latest character, Luna. Here’s everything we’ve found that you need this material for and how much you need:

Component	Pure Energy Residue needed
Afterglow Sword Synthetic Fiber	10
Luna Enhanced Cells	40
Ultimate Bunny Spiral Catalyst	89
Yujin Stabilizer	40