Forging a Legend

Forging a Legend is a side quest in Fallout 76.

Quick walkthrough

 * Use Cryptos to access the entry "Novice | Historic Swords."
 * Use the fabricator to obtain a swing analyzer.
 * Obtain Grant's saber from The Whitespring Resort in the Presidential Cottage and Museum.
 * Use any workbench to add the swing analyzer to the saber.
 * Kill six different creatures with the modded saber.

Detailed walkthrough

 * Log in to Cryptos to access the entry "Novice | Historic Swords" under "Database Queries."
 * Use the fabricator to obtain the swing analyzer by accessing the entry "Novice | Swing Analyzer."
 * Go to The Whitespring Resort's Presidential Cottage and Museum and get the staff access card on the second floor in a bathroom next to the skeleton.
 * Use the Presidential Cottage & Museum terminal on the first floor and access the entry "Display Case Access" within "STAFF ACCESS" to open the display case.
 * Get Grant's saber from the display case.
 * Use any weapons workbench to mod the saber with the swing analyzer.
 * Kill six different creatures with the modded saber.