Mysterious, magical (6)
I believe the answer is:
occult
I believe this is a double definition.
'mysterious' is the first definition.
(I know that mysterious can be written as occult)
'magical' is the second definition.
(I've seen this before)
(Other definitions for occult that I've seen before include "Hidden; mystical" , "Secret - paranormal" , "Secret - supernatural" , "Involving magical powers" , "Involving the supernatural, esoteric" .)