>>8574 Calling it Leo/Lion is an image of the creature guarding the bottom of hell, also called Cerberus. It's an infernal beast but also a representation of the force which rules karmic repayment. If you go below him, you are lost, he guards the gate to the tunnels of destruction. By controlling this force, they aim to also control the repayments of their spiritual debts.
The session
These sigils represent an inner energy circulation. Start by forming the simple one, then draw it out to form the second one. This is best done in lotus position or kneeling, or a combination. Using the Simhasana, lion pose, is also a functional approach.
To understand the sigil, think about it as corresponding to the inner energy centers of the body, it will connect male and female, the opposing forces. To properly link it with the external celestial system, you can understand the formation as the top spirals or circles representing the breasts or the chest, and the bottom represents the testicles or egg stems. This is how the circulation should be seen if looking physically. The Earth and its imagined sibling planet is the lower(or upper, you decide) pair and the Regulus contains the upper pair (or in reverse depending on your understanding).
Link them and aim for a breakthrough. If you are able to form the circulation you will also be able to understand how to do this.