The projection of the Psychic
Shield by use of a special
pentagram visualization is a form
of protection used by magicians.
Its purpose is to deflect or return
unwanted energies or magical forces
directly and indirectly sent from another
source such as a magician (rare) or
circumstance.  The projection of the
special pentagram also is used to fend
off self-induced negative thoughtforms
which draw forth discomfort or interfere
in magical workings.