Vexillomancy

Vexillomancy is the practice of magic involving FLAGS, both by casting them to to produce an effect and reading their positions to divine hidden knowledge. A Vexillomancer is a practitioner of Vexillomancy, one who makes and casts FLAGS, and recruits Signifiers.  A Vexillomancer is in continuous dialog with the FLAGS during the casting, reading their positions and directing their movements accordingly.

Casting

Spreading FLAGS into an area where their movements can be observed.  Proper casting involves placing the flags far enough apart that they cannot all be seen at once, while recruiting Signifiers to keep them in motion.

Signifier

One who carry a FLAG, or has intention to carry a FLAG.  A signifier  is channeling the will of the Crystal, either consciously or unconsciously.

FLAG Psychosis

A mental trance state in which Signifiers channel the will of the Crystal by meditating on the FLAGS.