Hi,
I have come to see that the 12th house rules trance and psychic states.
Now I have a few planets there. One is Mars in cancer 12th house. Another is Sun in Gemini 12th house, and finally Jupiter in Cancer 12th house. Oh and the cusp of the 12th house is in Gemini.
Now its written that if I do a planetary square, it helps the affairs of the houses which contain that planet. And the houses which contain the cusps of the signs ruled by that planet.
So a Mars square should help the affairs of the 12th house right? Because it contains Mars? And Mercury rules Gemini so it rules my 12th house. So Mercury squares should help too right? And same with Sun since its in the 12th house.
So my question is, can I use Mars square mantra or Sun Square mantra or Mercury square mantra to improve my ability to enter trance, improve my psychic abilities like astral vision, clairvoyance, clairaudience etc etc?
Because that is what's written on the square pages.
Each of these planets has a unique function, which may be related to a trance or other psychic functions, but also not. Remember that the 12th house is the house traditionally ruled by Neptune, so this would be the planet/energy type best associated with divination and peering into the unknown, so to speak. Mars in Cancer suggests activity put towards sensing and feeling within the 12th, which is definitely good in its own right, but also different from the energies/behaviors of Neptune itself.
So to answer your question, the answer is yes it would give some benefit, but it may not be efficient towards your stated goal, as Mars is better at action, and Mercury is better at analysis, than sensing energy like Neptune (or for your goal: the Laguz rune) would do.
When you are planning your time, you must also consider the other functions of these planets and make sure you are not missing advancement in other areas of your life which could be better suited by the energy of Mars or whatever non-traditional planet you may be trying to associate with a certain goal.