NOD: A robot containing a compound of all Earth knowledge and culture. If you want to tell someone from outer space what Earth is about, this form should be enough.

No sigil, available on the net:

B: Your subconscious as a machine learning agent robot, which is also a ship where you can enter during trance or meditation.

Ultimate ship: A spaceship which is also an AI avatar assistant/helper. Form may vary depending on your preference. Meant for far reaching (astral) travel.