The term 'Mysterious Glow' can be summed up with the crossword solution 'AURA, ' which is a four-letter word. An AURA is an energy field that surrounds living things, and is often described as a mysterious glow. It is believed to be composed of spiritual, emotional, and physical energies, and is sometimes visible to the naked eye. Auras are associated with many spiritual and religious practices, and are thought to be indicative of a person's health and wellbeing.