Ah, the 8x spawn is the Dyson Converter. That's supposed to be the stage two of the antagonizer. You're seeing that in a regular hybrid game? Wierd.
It's handleable with a significant defense. I've got the new HBCs, a stack of Laser IIs, a pair of fortresses, and ~250 friendly dysons backing me up and we're holding the line. So, yes. Run, run very fast.
What's wierd though is I never saw a notification of the converter being built. Antagonizer gave me around an hour's worth of warning. After an hour, the antagonizer just became a converter, no warning. Odd. Well, I have a saved game now with the converter (and an overpowering position) if there's other changes that need checking.
And yes, Keith, 8x is just nasty. Yeeesh. I might still Mil III it and see what the bare minimum is to hold it.