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"The Doomsday Device" is the eighteenth chapter of Star Trek: Federation Legacy, written between September and October 2016 and published on 20 October 2016. It is authored by CaptFredricks.

The USS Leviathan is dispatched to the Donia system by Starfleet Intelligence to confirm suspicions that an ancient weapon of mass destruction has fallen into the hands of a dangerous foe.



A large, slug-like vessel moves through a solar system and stops at one of the planets. A Klingon officer informs his captain that the vessel has arrived. The vessel, which the captain refers to as a "planet killer," fires its main weapon at the planet, obliterating it. It then "consumes" debris from the planet's remains. The captain of the Klingon vessel is quite pleased, stating that they now must "discover how to harness its great power and control it." Another of his officers, calling him Captain B'vat, states that with this weapon, not even the Klingon High Council or the chancellor will be able to stand in his way. B'vat then makes all of his crew swear their undying loyalty to him, telling them that with the planet killer, they will rule over "not only the Empire, but the entire quadrant." All of the officers swear allegiance to him, and then he states their first target: the Federation.

Act I: Secret Orders[]

Act II: Tension[]

Act III: Doomsday[]



Teaser • B'vat • Act I • Black Bart (hologram) • Jason Fredricks • Lucas Wells • Lenerea Mendel • Ethan Burgess • Tala Jones • Dylyp Azeli • Th'vol Olethla • Vance L'eher • Kyla VanZyl • Ernie Hauser • Act II • K'Valk • Jonah Willis • Kevin Briggs • Will Darrow • Walter Bozeman • Crusoe • Act III • Charlie Morgan
Referenced only
Act I • Jorel Quinn • Masc Taggart • Act II • Kas • Act III • James T. Kirk • Miral Paris
Unnamed USS Leviathan (NCC-93151) personnel • Unnamed IKS Worvig personnel • Unnamed holodeck characters


Teaser • IKS Worvig • Act I • USS Leviathan

Referenced only[]

Act III • USS Constellation


Act II • Donia system • Act III • Imaga system

Referenced only[]

Act III • Earth

Other references[]

Governments and organizations[]

Klingon Empire • Klingon High Council • Starfleet • Starfleet Intelligence • United Federation of Planets




planet killer



Background and trivia[]