These are the 10 skills and fields of science one must be proficiently knowledgeable in to reliably call himself Magus, according to the Picatrix.
Agriculture
Leading Soldiers, commanding armies, engaging in combat, calling animals & birds & hunting.
Grammar, Rhetoric, legal reasoning, making reasons, writing, buying & selling.
Geometry, surveying, lifting heavy objects, making machines, leading water, aerial instruments, making & using mirrors.
Astronomy
Music, singing, playing and writingnotes.
Dialectic
Medicine; Theory & Practice
Natural Science
Metaphysics
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