The second level of the eighteen levels of hell in the underworld is the karmic fire, which is the strongest fire in hell. It is specially used to punish sinners who wronged innocent people in the underworld. The victims must be devoured by the karmic fire for seventy-seven forty-nine days before they can leave. The burning of this karmic fire needs to be maintained through the formation of the candlestick in the human world. The way to maintain it is to use the soul to turn into a wick. One soul can be turned into a one-foot-long wick.