That Primordial is AWESOME! I love how he isn't just pure Flood either. He has a bug-like exoskeleton, which I'm guessing stems from his Precursor roots. That's really awesome.
I want to see it talk, and welcome Chakas and the Iso-Didact.....that's something I LOVE about the Primordial, he wasn't just some monster, he was intelligent and spoke in riddle-like phrases. He planned ahead, knew what was to come.
But this makes me wonder....what does a pre-Flood Precursor look like? The same perhaps, but with two strong legs instead of spider-like legs?