Space Manbow

In the year 189 of the stellar calendar, humanity happened upon the ruins of an ancient (and, if the st. 7 decor is anything to go by, rather decadent and malicious) civilization, and sent an archaeological crew to explore them. However, the crew managed to activate the ruins' defense system.

The system operated by identifying the Sol system as the intruders' origin, then launched the Sun-Fish ("Manbou" being Japanese for "Sunfish"), an ultimate weapon bio-mechanical starship capable of destroying an entire solar system and protected by an impregnable force-field bubble.