Comprehensive Guide to Carcadia Burn Vault and Radix Battle in Borderlands 4

This in-depth guide offers a comprehensive strategy for conquering the Carcadia Burn Vault, one of Borderlands 4's challenging dungeons. It meticulously outlines the steps required to locate the three essential key fragments, navigate to the Vault's entrance, and ultimately defeat the formidable guardian, Radix. Players will discover tactical approaches to manage the boss's diverse attack patterns, utilize environmental advantages, and maintain consistent damage output. Additionally, the guide details the valuable rewards awaiting successful adventurers, including experience points, in-game currency, and crucial character upgrades, ensuring a rewarding and strategic gaming experience.

The Carcadia Burn Vault, also known as the Vault of Radix, stands as the second distinct dungeon players can delve into within Borderlands 4. However, access to this mysterious location is contingent upon first gathering its three dispersed key fragments. Structurally, it bears similarities to the Fadefields Vault, yet the encounter with its final adversary, Radix, presents a unique combat scenario. This particular boss demands a heightened level of battlefield awareness and the ability to sustain offensive pressure throughout the engagement. The following sections will guide players through each stage of this adventure.

To begin your quest, securing the three elusive Carcadia Burn Vault key fragments is paramount. The first fragment resides within the Yawning Yard, an area situated in the Lopside region. A swift route involves fast-traveling to the Makeshift Chalet Safehouse. From this point, players should proceed south to find a structure featuring an elongated upper-level corridor. Ascending the exterior walls and entering this passage will lead to a dinner table where the initial fragment is conspicuously embedded. The second fragment is located in the Wreck of the Last Great Hope zone, part of the Tonnage Peel region, positioned west of the Lowrise Safehouse. Accessing the underground tunnels in this area is necessary; while multiple entry points exist, the southern entrance offers the most direct path. Once inside, a right turn into a short corridor bathed in red light will reveal a small ground-level door. Using a grappling hook to open this door allows passage into a cavern where the second fragment is concealed. The final fragment can be found in the Ruined Sumplands area. The most efficient way to reach this location is by fast-traveling north from the Judgement's Lapse Silo. Upon arrival, head northwest towards a body of water on the lower terrain. Turning right and searching for golden spheres embedded in the walls will lead players to the third and last key fragment, hidden beneath one of these luminous orbs.

Once all three key fragments are successfully acquired, the next objective is to locate the entrance to the Carcadia Burn Vault. Players should utilize the Rustical Hurl Silo for a rapid transit to the Grindstone of the Worthy region, provided it has been previously unlocked. The Vault door is situated directly north of this Silo, precisely where the Vault icon is displayed within the central blue circle on the map. Search for debris piles on the northwest side of the region; the altar that marks the Vault's entrance is cleverly concealed and will only manifest itself as players approach its specific location.

The confrontation with the Primordial Guardian Radix demands careful attention and strategic management of dash abilities to evade its attacks. Fortunately, Radix does not possess instant-kill explosive maneuvers, making the fight less punishing than some other boss encounters. Throughout the battle, smaller pangolins will continuously appear and pursue the player. While they can be eliminated, their constant respawn makes focusing on them inefficient. These creatures serve primarily as weak targets to aid players in recovering from 'Fight for Your Life' mode. It is crucial to note that Radix is protected by an energy shield, which can be rapidly depleted using electricity-based weaponry. The boss's damage output is scaled to the player's level, typically being two levels higher, ensuring a balanced challenge. Radix employs a variety of attacks, each with a specific counter-strategy. These include 'Flying Rocks,' where Radix smashes the ground to summon a defensive barrier of rocks; 'Shockwave,' a sequence of electrical waves best avoided by standing on the elevated rocks; 'Shooting Rock,' where an electrically charged projectile is launched; 'Jump Attack,' which requires quick lateral movement to dodge its area-of-effect landing; 'Underground Attack,' where Radix creates a trail of bombs after burrowing; and 'Tempest,' an area-wide lightning strike indicated by blue ground marks, necessitating timely dashes for evasion. Mastering these evasion techniques and conserving dash charges for critical moments are key to victory. Upon defeat, Radix yields an array of weapons, Eridium, cash, and unlocks two red chests, providing substantial rewards, including a backpack upgrade that reduces regen delay upon first completion.