- last post: 01.01.0001 12:00 AM PDT
Gravemind is a mass grave with the combined intelligience of all that went into him. So he could be made up of Forerunner. Look at his tentacle-it's a macabre lace of human skulls and victims. What would be more revealing is that the first cutscene of Gravemind, when MC regains consciousness, if you could hear low murmuring sounds that sound like "help", "help us".
I don't think the Forerunner created the Flood.