The Doomsday Device (STO)
(Star Trek Online MMORPG)
Stardate Unknown: After commandeering the B'rel class Bird-of-Prey I.K.S. Targ, you learn of B'vat's plan to unleash the Doomsday Machine on Federation worlds. Having confronted B'vat on Imaga, Starfleet is able to disable the Doomsday Device after an ultimate sacrifice by K'Valk.
Starfleet believed that the Klingons were testing their new weapons in the Imaga system.
We have information that now leads us to believe that these testing programs are for something much bigger than a new kind of torpedo.
Starfleet Intelligence has received a message from someone claiming to serve in Ambassador B'Vat's personal force. This source says that the ambassador's research is complete, and that he is planning on using some sort of a doomsday weapon on Federation worlds.
My aide, Lieutenant VanZyl, will join you for this mission. Go with her to the Donia system. B'vat has a small supply base near one of the outer planets. Our source, a man named K'Valk, says that we will find the information we need to stop B'Vat there.