The person said using the Halo Rings would annihilate the entire Destiny universe (which it would) and I questioned the probability of it wiping the entire Halo universe from existence as well. He kindly pointed out that Forerunners and Prometheans would be immune or sheltered from the Halo Rings blast. My last message acknowledges that I forgot about the Forerunners immunity and Prometheans shielded world, also acknowledging that with that knowledge their isn't a possible way that the Destiny Universe could topple the Halo Universe. :)

Forerunners are not immune, but ok.

Yeah, the forerunners wiped themselves out One of the vids in halo:legends I believe.