Professor of Void Item tells you, "I have been asked to impart my knowledge of the adventurers of this world."
Professor of Void Item tells you, "I can teach you all of the Void spells in a given level."
Professor of Void Item tells you, "If you wish to learn these spells, simply tell me which level you'd like to learn."
You waited too long to answer the question!
Professor of Void Item tells you, "Let me know if I can assist you in the future."