Here is a list of abilities granted by Shadow Magic. She unknowingly allowed everyone with sufficient mastery and intellect to learn Shadow Magic. It was, however, unlocked, when Morganthe met with the Shadow Magi. It was forbidden because it touched the true essence of the Spiral. It is so powerful and so dangerous, that Grandmother Raven and Bartleby told Headmaster Ambrose to never delve into it, and especially to never teach it to his students. Shadow Magic is an ancient form of magic in Wizard101, which is under the complete control of its embodiment, Grandfather Spider and his spider minions.