In Galactic Civilizations II, I just had something amazing happen. The Yor used a device, that turned all of the class 0 worlds in a 5x5 section of the large galaxy I was in, into class 16 worlds.
Over 50 class 16 worlds...where I had over 30,000 BC saved up to mass produce ships... I feel like I've just been handed the keys to the universe.