To everyone siding with destiny let me tell you this. The flood would infect a planet completely withen minutes. And used star roads to smash stars from across the galaxy. So the flood could easily destroy the sun and wipe out the guardians. The Vex have organic cores so the flood could take them over, with that or the logic plauge. The Cabal destroy moons for getting in the way...well the flood destroy solar systems that get in their way. Now you might say that oryx can just take the flood which is true but they can't take machines and the forerunners have trillions of onyx sentinels they can build up. Now the halo universe can't kill oryx because they are not of light. But they can contain him.