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"Use on a planet to summon an asteroid, raising the temperature and lowering the atmosphere level."
The Asteroid Call Button is a terraforming tool. When used, the player's spaceship projects a long tractor beam into outer space, which it uses to drag down a large flaming meteor and smash it into the planet. This raises the temperature and lowers the atmosphere level. Alternatively, it can be used a weapon against enemy cities.
This tool uses purchased ammunition.