By the power of truth, I, while living, have conquered the universe.
Posted by: the real Janaka
I always thought that the ring the Timeless One lived on, was Delta Halo; where MC, Cortana, and the rest met him. If the Timeless One and Gravemind are the same, that is...
Cortana even said something about the crater where you encounter the Gravemind for the fist time, something about it probably being created by an impact, but I was too busy shooting at things.
Maybe he crashed on the instalation (05)? Or is the crater caused by the war? A bit of topic, but what's the deal with that crater anyway, and the odd buildings around it?
EDIT: the numerology would make sense too; if MB can control five installations, it might make sense that he took nr 5.. Maybe... From a storytelling perspective anyway.
This is what I've been saying for a long time too. This is just more proof to back up the idea of the Timeless One and Gravemind being the same entity, Installation 05 was the Rings that Faber gave Mendicant Bias to oversee - his serial number is 05-032.