Find key fragment is an objective in the Story Mission, Going Rogue in Borderlands 3
- Ride the elevator up to the top and start heading to the North.
- From there, use the vending machines past the timber and in the corridor to restock and get ready for a mini-boss fight.
- Going through the corridor into the lumber yard will bring you into Highground Folly.
- You will start hearing the Rogues traitor, Archimedes, the Anointed.