"Egon Spengler: Okay. Think of the mandala as a city bus line. At the bus station, ghosts, or waiting passengers, are drawn into the system here and trapped. The concentrates their PK energy which is then eventually forced through to the next node, or 'station,' and so on, until it all ends at a final terminus. At each successive bus station, the station manager, or Node Guardian, stronger, so that it can keep the ghosts in line and destroy anyone who comes to the station to interfere with the flow. These nodes or bus stations gather the power used to feed a central point thus creating a much longer threat to our world. Does that make more sense now?"