The Overgrown prismatic key is an article in Lot 2 which allows you to unleash the full potential of the Prismatic Soup subclass. But finding the key itself is a bit of a puzzle, requiring you to track down four damaged ghosts.
In this Lot 2 guide, we’re going there how to get the overgrown prismatic key and unlock the prismatic fragment Facet of Mending.
How to obtain the Overgrown Prismatic Key
To get the Overgrown Prismatic Key, you must first collect four corrupted ghosts. They are found on the way to the overgrown prismatic key chest and can be collected in order. We have detailed the haunted locations below.
Ghost one location
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Load up on the Lost City location and turn around. Go through the old Vanguard room and jump through the hole on the right. Go outside and cross the large open area.
Credit: Bungie via Polygon
Once you reach the next Lost City loading zone, continue on and follow the path above. Once you reach the room with the large tree in the center, jump onto the wooden arch.
Credit: Bungie via Polygon
The first ghost is on a signpost hanging next to that arch.
Ghost two location
Credit: Bungie via Polygon
Go back to the room with the tree in the middle and look for the doorway above it.
Credit: Bungie via Polygon
Walk forward until you reach the railing.
Credit: Bungie via Polygon
Once you reach the railing, jump down and the ghost will be under the stairs.
Ghost three location
Credit: Bungie via Polygon
Use the platforms from the edge of the railing to jump to the indicated room.
Credit: Bungie via Polygon
Continue until you’re outside again.
Credit: Bungie via Polygon
Turn around and the ghost will appear above the doorway.
Ghost four location
Credit: Bungie via Polygon
Keep following the outside path until you reach the big yellow radar type thing.
Credit: Bungie via Polygon
The ghost is on the center left piece, as shown above.
Where can you find the overgrown prismatic key?
Credit: Bungie via Polygon
Once you have all four ghosts, continue down the path until you see four ghost markers on your map. They will be next to a chest and a sign. Stand on the slab and kill the four waves of enemies that appear. Once you kill the boss, the Overgrown prismatic key will fall. Use that key to unlock the chest and acquire the Facet of Mending.
Looking for more prismatic fragments in Lot 2? Here is our guide on how to obtain the Divided Prismatic Key.