I want to create a sci-fi story, and since galactic warfare is on a larger scale, nukes wouldn't do much damage (or I wouldn't think so anyway). I would like ideas about an ultimate deterrent that could destroy stars (or a bomb with a supernova blast radius would work too).
By "to destroy a star", i mean to kill off the star by causing a supernova, but any way to destroy a star works for me.
Assume that warp technology is available and transportation across a galaxy is quick.
Additionally would dropping an antimatter bomb on a very unstable star do any damage?
(i'veI've had another idea: what if you use energy from a star, concentrate it into a warhead, and the use the warhead to create a nova blast. is it plausible?)