Which is your favourite doomsday's weapon in sci-fi genre?

[CTRandall]

The Robot that can create anything, so long as it starts with n from Stanislaw Lem's Cyberiad. Don't ask it to create nothing! There's a reason there are empty spaces between stars and that there are no more gruncheons or pritons in the universe.

 

[WarriorMouse]

Wormhole Bomb "Farscape"

 

[Droflet]

 

[Starbeast]

The indestructible, universe destroying dragon, which was summoned by a space witch named, Xena. The creature is from the final chapter in the Project A-KO anime series, Uncivil Wars (1990). The unstoppable monster grew to the size of a galaxy.

 

[Cathbad]

The creature is from the final chapter in the Project A-KO anime series, Uncivil Wars (1990).

Dangit, I missed that one!

 

[Caledfwlch]

I am going to go for a nice simple answer.

A Dalek.

Cyber Leader: We have five million Cybermen. How many are you?

Dalek Sec: Four.

Cyber Leader: You would destroy the Cybermen with four Daleks?

Dalek Sec: We would destroy the Cybermen with one Dalek! You superior in only one respect.

Cyber Leader: What is that?

Dalek Sec: You are better at dying. Raise communications barrier!

 

[BAYLOR]

Skynet and the Terminators

Hm, That would also make great name for a rock Band !

 

[Starbeast]

The indestructible, universe destroying dragon, which was summoned by a space witch named, Xena. The creature is from the final chapter in the Project A-KO anime series, Uncivil Wars (1990). The unstoppable monster grew to the size of a galaxy.

Visuals are always great. Here's the gargantuan dragon-like destroyer on it's way to obliterate this universe. Can it be stopped!

@Cathbad Nice to see another fan out there.