Phantom Device

The Phantom Device is a consumable item in Fallout 76.

Background
The Phantom Device is a recreation of the device used by the fictional character Mistress of Mystery. Frederick Rivers built and programmed a fabricator for the Order of Mysteries to create them when provided with Stealth Boys and HalluciGen gas canisters, with advice from Kent Connolly, who also suggested using the then-redesigned Veil of Secrets as a gas filter for anyone who would use it, adapting it with a multilayered asbestos liner or activated charcoal.

Characteristics
Providing the invisibility of a Stealth Boy (30 seconds), the Phantom Device generates a cloud of HalluciGen Gas-laden smoke which frenzies nearby non-robotic creatures (15 seconds).

If the player character is wearing the Eye of Ra, then the duration of both effects is doubled.

With the Secret Agent perk at rank 3 and the Eye of Ra equipped, the invisibility lasts for 4 minutes.

Location
The recipe can be obtained by listening to the holotape Order of Mysteries - The Phantom Device, then constructing it at Riverside Manor.