Yaldabaoth is the Archon that delivers souls unto men. He creates the souls with cosmic energy, gives them all the innate knowledge that they will ever know, creates their destiny, and beams their soul into their body like a ray of light. As such, he knows every soul on Earth on an intimate level including their knowledge and their magic. You can use this piece to summon Yaldabaoth and beseech knowledge of other people from him. It doesn't matter whether you want the Voodoo knowledge of Marie Laveau or the pyramid knowledge of Aleister Crowley. Yaldabaoth has given all souls their knowledge and can thus also deliver it to you.