Want to open the Vault of Inceptus in the Fadefields in Borderlands 4? You’ll need three key fragments. Here’s where to find them.
In Borderlands 4, there’s plenty to explore – including hidden vaults that can only be unlocked with special keys. Each vault requires three fragments scattered across the larger outdoor zones. Once you’ve collected them, you’ll gain access to the vault, face waves of enemies, and earn both glider buffs and increased chances for legendary loot. To save you the hassle of searching, we’ve compiled all Vault Key fragment locations in the Fadefields for you.
- Note: Did you know Borderlands 4 has another Easter Egg? Here’s exactly where to find it and which trophy it unlocks.
How many Vault Key fragments are there in Borderlands 4?
There are a total of nine fragments in the game. You’ll always need three per region to craft a key and unlock a vault. That gives you access to three hidden vaults in total. Whenever you’re close to a fragment, a small radar appears on the right side of the screen. When the bars are full, you’re right on top of it.
All Vault Key fragments for the “Vault of Inceptus” (Fadefields)
Fragment #4: Coastal Bonescape
- Chest behind a house on the southwest coast.
- Located on a veranda, accessible via stairs.

Fragment #5: The Howl
- Found in the eastern section of “The Howl.”
- Search inside a cave – that’s where the fragment is hidden.

Fragment #6: Idolator’s Noose
- Located in the sewers beneath Rosemary’s Reserve.
- Use the grappling hook to open a hatch and climb down.

Location of the Vault of Inceptus
You’ll find the vault between the two fast travel points “Zadra’s Plan B” and “Wyclef’s Reprieve” in the eastern Fadefields. Once you activate the Vault of Inceptus, you can enter and face multiple waves of enemies across several islands before a boss fight awaits.
- Boss fight tip: Use your grappling hook to expose the boss’s armor and hit its weak spots for critical damage.
