couple of seconds, larger ones such as the sovereign and galaxy can be split into two within a similar time (if you are very lucky, using their neck weakness). It will take at least 5 - 20 starships to even take on the cube, and less to take on the sphere. I would recommended at least 20 ships (if your computer can handle it) probably even more as during testing i took on 5 Galaxies and 7 Sovereigns and still won (took minor damage though, in the Cube).
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