Fractis location (The Crawlcroft, Carcadia Burn)

Region Zone Bunker Access requirement
Carcadia Burn Grindstone of the Worthy The Crawlcroft (Order Bunker) Order Bunkers unlock after the main mission “One Fell Swoop”

The Crawlcroft entrance sits inside a Timekeeper military installation in Grindstone of the Worthy. From the base perimeter, drop into the cave network and push inward.

The bunker door is sealed behind shield plating. Grab a nearby Locust canister in the cave’s starting area and throw it at the plating to strip it and open the door.

Fast route to the arena (skip the trash)

Once inside The Crawlcroft:

  • Sprint past the first large combat space and head for the partially opened doors across the hall.
  • Follow the winding corridor into a small nerve center, then take the red‑lit corridor on the left.
  • Crawl under the stacked boxes into an enclosed room, grapple up, and keep following the hallways.
  • Pass the vending machines room — the boss arena is directly beyond.

Fractis boss mechanics and weaknesses

Fractis opens by hiding its floating core behind a gold armor phase (blue bar). Treat this as a shield check, then a health burn:

  • Use Shock damage to shred the golden armor (blue HP).
  • Swap to Incendiary to quickly burn its health (red HP) once the armor breaks.
  • A small repair drone will periodically spawn and attempt to restore Fractis’ blue bar — delete this immediately to prevent a reset.
  • Expect slow energy projectiles and periodic adds; stay at mid‑range, strafe, and keep line of sight to read the projectiles.

Because the drones can extend the fight, prioritizing them is the difference between a 90‑second clear and a slog.

  • Primary: a Shock option (SMG/AR/ordnance) to crack the blue bar fast.
  • Secondary: an Incendiary gun for the red bar burn phase.
  • Utility: mobility (slides, grapples) to kite projectiles; a sustain tool (lifesteal, fast recharge) to stabilize during add waves.
Tip: If your build leans on crowd control, Cryo can keep stray adds off you while you focus the repair drone.

Legendary drops (what each item actually does)

Item Type Unique effect
Chuck Assault Rifle Pitcher — Tediore‑style thrower that’s hurled instead of fired; each throw consumes 10 rounds from the mag.
UAV Grenade/Ordnance Death from Above — marks a spot and calls in a short‑delay missile strike. Works indoors.
Protean Cell Shield Direct Current — Ground Slam to toggle. While active, slowly drains shield to grant +40% bonus Shock damage; incoming damage passes through the shield.

Chuck is a reliable boss‑room workhorse when you want damage while moving; UAV’s delayed strike is good for pinning stationary targets or punishing repair drones. Protean Cell pairs naturally with Shock‑centric builds and Fractis’ own shield check.

How to farm Fractis efficiently

  • Use Shock to break the armor, delete the repair drone on spawn, then swap to Incendiary for the health phase — repeating this loop minimizes downtime.
  • Ignore non‑threatening adds and maintain distance so you can read projectile arcs without camera whiplash.
  • Once Order Bunkers are unlocked, Fractis can be refought repeatedly; the encounter’s straightforward phases make it a consistent target‑farm for Chuck, UAV, and Protean Cell.
  • Moxxi’s Big Encore Machine can be used to respawn bunker bosses for back‑to‑back runs.

If you’re specifically hunting the Protean Cell for Shock builds, lean into Shock damage sources during the blue bar phase to speed clears and maximize runs per hour.

Troubleshooting common snags

  • Bunker door won’t open: you must hit the shield plating with a Locust canister from the cave’s starting area — gunfire won’t strip it.
  • Armor keeps coming back: prioritize the repair drone as soon as it spawns to stop Fractis from re‑shielding.
  • Time‑to‑kill feels long: check that you’re swapping elements; Shock on the blue bar and Incendiary on the red bar is non‑negotiable here.

Fractis is purpose‑built for fast, repeatable clears: short pathing, a clean Shock‑then‑Incendiary flow, and a small loot pool with three useful legendaries. Once your route and swaps are muscle memory, it becomes one of the steadiest farms in Carcadia Burn.