 She sends Chant-to-Green off to the lesser Ark with the planet's remaining humans and passes her title of Lifeshaper on to Chant while remaining on Earth herself.During her last days on Earth, the Gravemind sends down ancient human essences, including the Lord of Admirals, to reveal that the Domain was created by the Precursors as the collection of wisdom from over 100 billion years of knowledge and that it was ingrained in Precursor architecture for safekeeping.In short, the Domain is the mythical Organon.