everyone can use aura. your aura is your life force. it is to be known to be the River of Life. It goes through us all and through everything. most or some are never aware of their spirit powers and go the rest of there lives not knowin what can go on beyond normal sight. those who can use aura and equip new abilities of new auras can become stronger with time and discipline. this is mostly what i know of this subject but i have experience with certain auras i have obtained.