The Medusa Canon

The Snakeskin Built This Canon Which Can Hit The Surface Of A Planet And Every Atom Into Rock, Which Leaves Their Resources And Surface Habitable.

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The Medusa Canon
This Canon has the ability to turn any planet or moon into Solid Rock. The Snakeskin Then mine that planet for resources, and kill any survivors.
The Canon itself doesn’t look that menacing. It’s a giant shiny tube that extends from a point on the planet Obsolutionite. The way it works, is that someone ha to look through the telescope on the side of, to choose the planet. Then they have to charge the canon up, and type in the coordinates of where you want it to hit. Then everyone has to stand 5 miles back, as the canon shoots a grey mass that hits the planet and turns every atom on the surface to stone

Does it have a weakness? A weak spot that prevents the weapon from being overpowered?

The Medusa Canons only weakness is the same for all rocks on earth. Erosion. Luckily, no other planet knows that, and Obsolutionite never has rain.

I understand that, however, I feel as if you are trying to make it a tad too powerful...as no one can tell about the weaknesses, but what happens when it encounters rain on Earth? I think there needs to be a few weaknesses to balance out what is a very powerful weapon.