Stick fighter planet.
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Stick fighter is the most cratered planet in the solar system.
It has a supervolcano that actually glows from the surface and from outerspace.
It has 80 active Volcano’s, and 23 active supervolcano’s. Making it the most volcanic active planet in the solar system. If every volcano on this planet blew up, it could potentially damage other planets as well.

This planet was habitable a few times, but every species that lived there made the planet a war zone with constant battle.
Everyone that ever lived on the planet practically killed their own species. They also heavily made the atmosphere toxic, so toxic that you’d need an equivalent amount of oxygen and safety to the amount of 16 astronaut suits.

Its also the closest planet to the sun.
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