Killer-of-emo-People:there is no way the flood could have oggten in the sheild world. if you have read ghosts of onyx then yoou know how well the forruners protected it. also the sheild world only opened once the rings were fired leaving the flood only a few days to both find onyx and getting in the shgeilded part
I have read GoO. And I clearly remember that the Humans were defending the portal into the Shield world, and the Covenant nearly got in.
The Spartans got lucky that the Covenant didn't get into the Shield world, maybe the Forerunners were not so lucky while fighting the Flood....
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