When the innumerable Boddhisattvas who appeared from the underground vowed to spread the Lotus Sutra, Shakyamuni Buddha and the other Buddhas as his emanations showed their supernatural powers. That is, they stretched their broad and long tongues upwards until the tips reached the top of the heavens, and they emitted rays of light with an immeasurable variety of colors from their bodies. They coughed and snapped their fingers, and these two sounds reverberated over all the worlds, making them quake in the six ways.
Then Shakyamuni Buddha said to the congregation, "The supernatural powers of the Buddhas are immeasurable, limitless and inconceivable. But I shall not be able to describe the merit of this sutra to those to whom this sutra is to be be transmitted even if I continue describing them by my supernatural powers for immeasurable kalpas. Those who would keep this sutra will be able to attain the enlightenment of the Buddha definitely and doubtlessly."

The last part of Chapter 21 is chanted for ancestral services and services for deceased ministers to praise them for following the teachings of the Lotus Sutra.

Dharanis are spells cast by some bodhisattvas and deities to protect a person who keeps the teachings of the Lotus Sutra. Those spells are often chanted during a healing prayer. Each word of the spell contains several meanings, and the meanings of some words were lost. Therefore those spells cannot be translated into any language.
The following is a list of bodhisattvas and deities who cast spells in this chapter: Medicine King Bodhisattva, Brave In Giving Bodhisattva, Vaisravana Heavenly King, World Holding Heavenly King, the ten raksasis and their mother, the Honorable Hariti.

The dharani spells of this chapter are chanted for fulfillment of wishes or when a prayer asks the protection of deities, especially the Honorable Hariti.