Forging a Legend

Forging a Legend is a side quest in Fallout 76.

Quick walkthrough

 * Listen to the holotape Order of Mysteries - the Blade of Bastet.
 * 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
Note: Not all creatures are counted towards the goal. The following lists contain the animal known to count and not count towards this objective, however both are incomplete.
 * Listen to the holotape "Order of Mysteries - the Blade of Bastet."
 * 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.

Contributing creatures

 * Beaver
 * Bloatfly
 * Brahmin
 * Eyebot
 * Feral ghoul
 * Grafton monster
 * Liberator
 * Mongrel
 * Opossum
 * Radroach
 * Radstag
 * Scorched
 * Super mutant

Non-contributing creatures

 * Frog
 * Mole rat
 * Mr. farmhand
 * Rabbit
 * Wolf