Chasing Shadows

Chasing Shadows is a side quest in Fallout 76.

Background
The Phantom Device is the Mistress of Mystery's tool for stealth and infiltration. To master it, the player needs to first gather the necessary ingredients.

Quick walkthrough

 * Use Cryptos to access the entry "Novice | Phantom Device Component."
 * Obtain a HalluciGen gas canister from Garrahan Mining HQ or Darling sister's lab if not already in possession.
 * Obtain a Stealth Boy from the marked location if not already in possession.
 * Use the Fabricator to make the device.

Detailed walkthrough

 * The player has to first access the Cryptos mainframe and learn of the components needed for crafting the device: A HalluciGen canister and a Stealth Boy. If the player already has these in their possession, they simply need to combine them at the fabricator in the Manor to complete the quest.
 * Otherwise, they need to find them. The Stealth boy can be found at the North Cutthroat camp, in a locked footlocker, while the HalluciGen canister is in the Garrahan Mining Headquarters, in the CEO's office, in her safe.