The third and final fragment is tucked away in Borderlands 4 Boosting the Ruined Sumplands. Fast travel from the Judgement's Lapse Silo, then head north.
In this swampy region, make your way northwest until you reach a pool of water on the lower level. From here, look right and scan the nearby walls. Golden spheres embedded in the stone mark the area. Beneath one of these spheres, you'll find the last fragment. Grab it, and you're ready to open the Vault itself.
Locating the Carcadia Burn Vault Door
With all three fragments collected, your next objective is unlocking the Vault door. Travel to the Grindstone of the Worthy region. If you've already activated the Rustical Hurl Silo fast travel point, use it to cut down on travel time.
From the silo, head north until you're close to the Vault icon marked on your map. This is where things get tricky - the entrance is concealed. Look around the northwest side of the region for a debris-strewn area. As you approach, the hidden altar will rise from the ground, revealing the Vault door. Place your fragments, and the path inside opens.
Boss Guide – Defeating the Primordial Guardian Radix
Radix is unlike most bosses in Borderlands 4. Instead of overwhelming you with one-shot mechanics, the fight is a test of endurance and agility. The arena constantly shifts with hazards, and pangolin mobs will spawn in waves. These smaller enemies don't deal much damage, but they're valuable - they exist primarily to give you a chance to revive if you get downed.
Radix also carries an energy shield. Electric weapons are your best option here, since they can strip its defenses much faster. Keep in mind: the boss always spawns two levels above your character, so its attacks scale to remain threatening.
Here's a breakdown of Radix's moveset and how to counter it:
Flying Rocks: Radix slams the ground, raising rocks that orbit its body. These make it harder to close distance and attack. Later phases expand the rock wall outward, forcing you to reposition. Use ranged weapons or climb the rocks to maintain damage output.
Shockwave Combo: Often following the rock pillars, Radix slams the ground repeatedly, sending four shockwaves across the entire arena. Your best defense is mobility - jump or climb onto one of the rocks from the earlier attack to avoid the electric waves.
Charged Rock Shot: Radix raises its left arm, supercharges a rock with electricity, and launches it at your current location. Dashing sideways at the right moment will keep you safe.
Jump Attack: After burrowing briefly, Radix leaps at you with Borderlands 4 Gear its electrified arm. Dodge laterally, but stay at a safe distance - the impact creates a damaging area around the landing point.
Comments (0)