Approximately 18" - 24" One way you can smudge with sweet grass is to light the end of it. Carefully wave it so that it will burn enough to release smoke into the air. Sweet grass doesn't burn as well as cedar or sage, so people typically burn sweet grass with another sacred medicine so it will continue to burn. Reiki Infused with Holy Fire Energy. A New Reiki Energy, Holy Fire® Reiki is a new form of Reiki that was introduced about three years ago by the ICRT. It is both powerful and gentle and provides purification, healing, empowerment and guidance. Holy Fire® energy is noticeably more refined and comes from a higher level of consciousness.