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Borderlands 4 Guide

How to Unlock The Legendary Flak Cannon

Weapons
Legendary Loot
Ordnance
Updated on May 29, 2026
May 29, 2026

Overview

The Flak Cannon is a Vladof Heavy Weapon

Flak Cannon has a legendary effect called Flakking Good


How to Unlock

Unlock Location:

  • Progress through the (Subjugator and Thol the Invincible) Raid until reaching the Raid Bosses
  • You will find Subjugator and Thol in the same boss arena.
  • Defeat Thol "Last" to get a chance to fight Thol one on one to get the Legendary Mad Flak.


Farm Method:

  • Defeat The Subjugator "First", then Defeat Thol
  • After use the Encore Machine nearby to reset the fight.
  • Repeatedly defeat Both Bosses in order
  • The Subjugator "First", then Defeat Thol until Mad Flak drops.

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