There are 4 Houses that deal with the Energy of Mysticism & Occult, but first, you need to understand the Virtue & principles behind these words; mysticism represents Mystery "My-Story" since we all as "Spirits/Observers" trying to find who we are through learning our Stars alignment or which body of water our ancestor came from, Generational curse, karma, etc. For this reason, they teach us His- story, which controls our level of "Awareness" through Internalizing/Receiving their Light instead of Externalizing/Pushing our Light. Furthermore, the occult represents the science of communicating with the Unseen & Unknown through understanding systems of how things manifest from mental to physical.
1) 8 house/ Scorpio = Fixed Water (Emotion,Connection)
Develop mysticism by pay attention to behind the scenes Death, Sex,Secretive, Occult
2) 9 house/Saggitarus = Mutuble Fire (Imagnation ,Seperation)
Develop mysticism by being philosophical broad, and open-minded to take adventures Externally & Internally to develop a moral system
3) 11 house/ Aquarius = Fixed Air (Logic,Intellect)
Develop their mysticism by having a fixed way of communicating and analyzing scientific revolutionary abstract ideas dealing with groups
4) 12 house/ Pisces = Mutable Water (Emotion,Connection)
Develop mysticism by being mutable with its ways of connecting emotionally to collective conscious Emotion/Behind the scene realm