What to know

  • Fractis is a boss located inside The Crawlcroft Order Bunker in the Grindstone of the Worthy, Carcadia Burn area.
  • The boss drops several legendary items, including the powerful Chuck assault rifle, the Protean Cell shield, and UAV grenade.
  • Fractis becomes accessible after completing the main mission “One Fell Swoop.”
  • Farming Fractis is a recommended method to obtain rare and highly effective weapons and gear.

Borderlands 4 features Fractis as a significant boss encounter providing players with a chance to farm valuable legendary items. Found within The Crawlcroft bunker in the Grindstone of the Worthy region of Carcadia Burn, Fractis is one of the key bosses whose drops are highly sought after by players aiming to enhance their arsenals.

Notable legendary drops by fractis

Fractis drops several important legendary items that are valuable to players for various playstyles. The most notable among these is the legendary assault rifle called the Chuck. The Chuck is praised for its power and unique perk that causes homing tracking and an explosive effect turning hits into multiple MV grenades, which significantly improves crowd control and damage output. Additionally, Fractis drops:

  • Chuck (Assault Rifle)
  • Protean Cell (Shield)
  • UAV (Grenade)

These items are part of the dedicated loot pool exclusive to Fractis and contribute to his popularity as a boss to farm repeatedly.

Where to find Fractis in Borderlands 4

Fractis can be encountered inside The Crawlcroft, an Order Bunker that players can unlock after progressing through the main storyline and specifically after finishing the mission named “One Fell Swoop.” The Crawlcroft bunker is situated in the Grindstone of the Worthy area in Carcadia Burn, making it a mid to late-game boss farm target.

To reach Fractis, players must navigate through corridors and a series of paths inside the bunker until finding the boss fight area.

Abilities and behavior of Fractis

The distinguishing mechanic in the Fractis fight is that Fractis summons a golden version of itself, cloaked with a shield, which accompanies the main body. Key points for that behavior:

  • The golden duplicate has a protective shield that makes it more durable.
  • That shield is weak to Shock damage, so employing Shock weapons or effects helps remove that shield.
  • Once the golden version is eliminated, you can more safely focus on Fractis itself.

Besides that, Fractis’ normal attack patterns include standard boss traits (area attacks, phases, damage spikes). The fight demands good positioning, managing the duplicate, and using elemental weakness to your advantage.

How to defeat Fractis efficiently (step-by-step guide)

How to prepare

  • Gear up with Shock weapons (guns, grenades, etc.).
  • Bring mobility tools (grenades, movement skills) to dodge area attacks.
  • Make sure you have healing and good shielding — the fight can spike damage.
  • Be ready to deal with two bodies initially (main + golden version).

How to fight

Step 1

When the fight starts, identify the golden shadow version Fractis summons. It typically appears with a shield that’s more resilient than Fractis’ base form.

Step 2

Switch to Shock-based damage and target the shield on the golden version. The shield is weak to Shock, so Shock damage is more effective in bringing it down.

Step 3

Once the duplicate’s shield is destroyed (or the duplicate itself eliminated), focus fire on Fractis’ main body.

Step 4

Watch for Fractis’ high-damage phases and dodge accordingly. Use cover or movement skills to evade big attacks.

Step 5

Finish off Fractis. Collect loot from its drop pool, notably the Protean Cell.

If your first run fails, retreat, resupply, and try again — focusing on eliminating the duplicate quickly is key.

Tips for farming Fractis efficiently

Farming Fractis can be a lucrative activity if built correctly with appropriate character builds. Boss fights against Fractis are not overly difficult, so players with decent damage output or specific builds (such as bleed or high burst damage from classes like Vex or Siren) can clear the boss quickly. Frequent runs will increase the chance of receiving the homing or rolled variants of the Chuck assault rifle, which are prized for their enhanced capabilities.

Fractis stands out as a boss whose signature mechanic — the golden duplicate with a shield — demands quick prioritization and proper elemental counterplay. Be prepared with shock damage, good mobility, and patience. The reward (notably the Protean Cell) makes it well worth the effort in the Carcadia Burn region.