the power to command demons

The potential (ONE) to control through suggestion the untapped potentiality (ALL) within the ignored potential (ONE).

You represent the power (potential); demon (immaterial) represents the untapped power (potentiality) aka your lack of comprehension; and those who suggest beliefs (-isms) to you "commandeer" the fiction you believe in; while acting in ignorance of reality.

to speak with animals

AN'IMAL, noun [Latin animal from anima, air, breath, soul.] aka using suggestion (words) to influence the communication between ONE and ALL (breathing aka adaptation needed for animation).

signet ring

Signet (seal); Ring (circular line) aka ignorance towards ongoing line (motion).

magic

MAG'IC, noun [Latin magia] - "the art or science of putting into action the power of spirits" aka motion. "using a magic trick" represents utilizing motion (reality) to play a trick on those who consent to ignore it for suggested beliefs (fiction).

occult

OCCULT', adjective [Latin occultus, occulo; ob and celo, to conceal.] - "hidden from the eye or understanding". How can ONE conceal ALL offered? By choice of ignorance.

alchemy

Alchemy (interrelation) aka transmutation of ONE (potential) out of ALL (potentiality).

solomon

Solo (alone) - an allegory for 'ALL(in)ONE' aka ALL is ONE in energy.

Mon (men) - an allegory for the electric aspect of energy aka the velocity of motion; in opposition to the magnetic (female) aspect of energy (momentum) aka the moment(um) ONE exists within ALL motion.

testament

TEST'AMENT, noun [Latin testamentum, from testor, to make a will.] aka free will of choice used to proCLAIM aka claiming ownership over a reality defined by motion aka ignorance of motion.

The date of origin legends...is difficult to establish.

The date - (inversion of motion)

of origin - (information aka energy aka ALL potentiality)

legends - (suggestion)

is difficult to establish - (lack of comprehension).