A quick look at mist, spirituality and the meaning of the Mist card in the Go Deeper oracle.
Mystical, on the other hand, is a word which I hear misused a lot these days, and it's a shame, because it leaves those who use it more correctly in the position of being misunderstood -- and I don't see it being practical to go back and change all the old books to a newer, easier word for the benefit of the ignorant!
Webster offer us this:
MYSTICAL 1 a : having a spiritual meaning or reality that is neither apparent to the senses nor obvious to the intelligence <the mystical food of the sacrament> b : involving or having the nature of an individual's direct subjective communion with God or ultimate reality <the mystical experience of the Inner Light>
Mist - The touch of another world. In losing ourselves we find something greater.
The Mist of the mystical experience tends to come when we're ready, not when we think we're ready. If this card occurs in a reading I see it as a positive thing. Someone is having, or will have, wonderful experiences of a spiritual nature. However, in order for such experience to happen, and be meaningful, we need to let go of ego and allow perceived reality to dissolve, in order to make room for that "something greater."