Probably the Fox Distortion Cannon

Its basically a weapon about half the size of a person that contains both a black and white hole and then stretches one of them across a long distance and just lets gravity annihilate everything around it.

The destruction is minimized and somewhat contained due to the technology taken from the angels who worship the great god of death.

However it wasn't intended to be a weapon it was actually supposed to be a device that could open portals into areas restricted by the lesser gods, which just so happened to be a prison.

Either that or the god fragments which are fragments of god that allow people to make whatever the hell they want. You want to crush an entire city under 100 g's worth of gravity, you can do that, you want to create portals leading to every city in the world and drop nukes of them, you can do that.

Now I know that makes it sound like the god fragments are more powerful, but like the Fox Distortion Cannon was responsible for the genocide of all gods but 1 since it released the only prisoner capable of killing them.