It works on the emotional and spiritual levels. It promotes healing and is useful with past life issues. It helps release karma and deeply seated issues on the cellular level. It isuued to break up the negative patterns we unconsciously adapt to insulate ourselves from the truth, hence shattering delusion and denial. Thus it heals the shadow self. Karuna Reiki fills the learner with love and restores balance. The Karuna II symbols are of a higher vibration and more powerful. They help connect directly with the Higher Self and work on a much more deeper level. It instills intuitive guidance. It is an intellectually stimulating experience.
Karuna Reiki is not a substitute for Usui Reiki, but certainly the next step after it.