As I said in my previous experience, mirrors can be gateways into the realms of the dead and spirits.
Now I am going to talk about a type of mirror which a lot of sorcerers use.
The Black Mirror-
The black mirror is a tool of scrying and divination, the black mirror proves also a tool of contacting and communicating with Spirits and shades of the dead as well. The black mirror is made of something such as onyx or perhaps even a plate of glass painted with a rich black, for which a reflection is still obtainable. Some chaos sorcerers have created black mirrors from a piece of glass with black electrical tape on the reverse side. This proves efficient and inexpensive as well as offering the same affect.
The Hebrews believed that the mirror was a gateway into the caves of Lilith and her Succubi offspring. Young women were discouraged from using mirrors for this reason, lest they become possessed by the Demoness, who will drive them to sexual acts with sleeping men.
The Black Mirror is considered also a tool for Atavistic Resurgence that the demons of the mind or the lycanthropic state may be brought out by enchanting the self to open the imagination to images in the reflection.
The Black Mirror in the Work of the Goetia is used as a tool to communicate with the bound spirit or familiar after initial evocation. But be warned the Goetia is not a book to be messed with.
The sorcerer who summons the Angel or Demon may bind it accordingly to the vessel, and at a later time evoke the spirit again and use the Black Mirror to visualize its form and impressions it may send. If a specific Goetic spirit is bound with the magician as a familiar/famulus, then the Black Mirror is ideal in communication.
Some have used divination boards in front of black mirrors to
Communicate with spirits, this techniques proves a powerful gnosis to step into, as you essentially bring the astral/ghost realm into the physical plane.
The mirror is used in the following way-
1. Summon the Spirit in the Evocation Circle
2. Bind the Spirit to the vessel and sigil accordingly.
3. Use the mirror to contact the spirit later after it has been bound.
4. Contact the spirit before sleep to ensure a detailed communication
I thank you for reading.
Sources-
THE LESSER KEY OF SOLOMON OR Clavicula Salomonis
AND GREATER KEY OF SOLOMON THE KING