Conquering 'Sum of His Parts': Your Essential Borderlands 4 Walkthrough

Ah, Vault Hunter, another day, another chaotic adventure across the Borderlands! If you've found yourself scratching your head over the enigmatic 'Sum of His Parts' mission in Borderlands 4, fear not! We've got your back with a comprehensive, step-by-step guide to help you navigate this intricate quest, gather every crucial component, and earn your glorious rewards.

This mission, often picked up from the eccentric Tannis in her makeshift lab on Promethea, tasks you with reassembling a mysterious device that could hold the key to untold riches...

or unimaginable destruction. Prepare for a journey filled with challenging foes, tricky environmental puzzles, and, of course, a healthy dose of Borderlands mayhem.

Objective 1: Locating the Primordial Coil

Your first stop on this scavenger hunt is the arid, bandit-infested canyons of Meridian Outskirts.

Tannis believes the 'Primordial Coil' is hidden within a heavily guarded Maliwan research facility. As you approach, be ready to face waves of Maliwan troopers, including shielded Heavies and agile Nogs. Utilize elemental damage – corrosive against armor and shock against shields – to tear through their defenses efficiently.

Once inside the facility, you'll need to activate a series of pressure plates to open the main vault.

Keep an eye out for glowing symbols on the ground; stepping on them in the correct sequence will disengage the locks. The Coil itself is nestled deep within a cryogenic chamber, guarded by a Badass Maliwan Operative. Take them down, grab the Coil, and prepare for extraction.

Objective 2: Retrieving the Crystalline Conduit

Next up, Tannis directs you to the lush, yet dangerous, jungles of Eden-6.

The 'Crystalline Conduit' is rumored to be growing in the belly of a colossal Jabbermogwai nest. This area is teeming with aggressive flora and fauna, so keep your distance from explosive Skags and watch out for the venomous attacks of Ratch. A good incendiary weapon will make quick work of these organic threats.

The Conduit isn't just lying around; it's protected by the enraged Jabbermogwai Matriarch, a formidable beast with surprising speed and elemental attacks.

Focus fire on her exposed weak points, typically her glowing eyes or chest, and dodge her ground slams. Once she's defeated, the Crystalline Conduit will be accessible from the remains of her nest. Be quick, as other Jabbermogwai may try to reclaim it!

Objective 3: Securing the Ethereal Core

Your final, and perhaps most perilous, destination is the desolate, frozen wastes of Xylos.

The 'Ethereal Core' is located within the ruins of an ancient Eridian temple, long since overrun by the Children of the Vault. Expect fierce resistance from cultists, Fanatics, and their monstrous pets. Bring your best splash damage weapons to clear out groups effectively.

To reach the Core, you'll need to navigate a series of treacherous ice platforms and activate ancient Eridian mechanisms by solving a simple light puzzle.

Shoot the Eridian glyphs in the order indicated by the flickering lights around them. The Core itself is guarded by a truly massive Goliant, mutated by Eridian energy. This foe will adapt to your damage types, so be prepared to switch weapons frequently and exploit its exposed joints when it glows after an attack.

Once the Goliant falls, the Ethereal Core is yours for the taking.

Objective 4: Return to Tannis

With all three crucial components in hand – the Primordial Coil, Crystalline Conduit, and Ethereal Core – it's time to make your triumphant return to Tannis's lab. Present her with the collected parts, and watch as her eyes light up with scientific glee.

She'll meticulously assemble the device, revealing its true, awe-inspiring purpose.

As your reward for enduring the trials of 'Sum of His Parts,' Tannis will bestow upon you a hefty sum of experience points, a substantial amount of cash, and a legendary piece of gear that will undoubtedly aid you in your future Vault Hunting endeavors.

Congratulations, Vault Hunter! You've successfully navigated one of Borderlands 4's most intriguing missions. Now go forth and conquer the rest of the Borderlands!