The dictionaries dont convey the connotations.Dictionary.com
adj
1. involving or characterized by esoteric, otherworldly, or symbolic practices or content, as certain religious ceremonies and art; spiritually significant; ethereal.
2. of the nature of or pertaining to mysteries known only to the initiated:mystic rites.
3, of occult character, power, or significance:
noun
1. a person who claims to attain, or believes in the possibility of attaining, insight into mysteries transcending ordinary human knowledge, as by direct communication with the divine or immediate intuition in a state of spiritual ecstasy.
2. a person initiated into religious mysteries.
Merriam-Webster.com
Mystic (Definition 1)
mys·tic | \ ˈmi-stik \
1: MYSTICAL sense 1a
2: of or relating to mysteries or esoteric rites : OCCULT
3: of or relating to mysticism or mystics
Mystic noun (Definition 2)
1 : a follower of a mystical way of life
2: an advocate of a theory of mysticism
Mysticism
1: the experience of mystical union or direct communion with ultimate reality reported by mystics
2: the belief that direct knowledge of God, spiritual truth, or ultimate reality can be attained through subjective experience (such as intuition or insight)
Examples of mysticism in a Sentence
// Jewish, Christian, and Islamic mysticism.
// a student of Eastern mysticism
Both are mind-over-matter.He was more reality warper than telekinetic seer wasnt he? He always appeared where he was needed so that things happen as they should

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.