Pendulum Bob

Opens the gate of the Founder's Hall: hang it in the dead clock above the gate. After the Restart the gate lets it go, and a Confluence makes it the Rewind Weight.

The heart of the Great Pendulum: a small brass bob whose dial stopped at the Still Hour, with a warm spark still caught in its lens. Hung in the dead clock of the Founder's Hall gate, it makes the clock go.