Disciple, Don't Ask, I Really Don't Know How to Do This Magic!

Aize traveled through time and became a magician of God, admired by thousands of people. But, without inheriting the memory, there is no magic. Helpless, he could only use his ten years of poor cosplay experience to pretend to be the magician of God. But what's even more deadly is that he was forced to accept five problem students: The kingdom-destroying princess, the vengeful elf, the ruined demon, the stupid dragon, and the saint with two faces. Dragon Girl: "Teacher! That crazy woman is fighting with the elf sister again!" Miss Devil: "Teacher, (yawn) the potion in your basement was drunk by that stupid dragon. (Not caring)" Saint: "Teacher, I'm scared. Teacher, I'm so excited!" Elf Knight: "Teacher, can we have more learning content today? You taught too little. I long for more..." Princess: "Teacher, I want to learn magic that can destroy the country." Aize: "... How about we start with the fireball technique?" Princess: "Teacher! Please have a discussion with me!" ... How about you put me back on? Aize: "Where did that lazy and greedy demon go? Wait, where is my staff? Oops! She stole it!" After finally getting the staff back from Miss Demon, Aize fell silent. This thing... How to use it? "Teacher! (In unison) What is this magic spell!" Disciple, stop asking! I really don't know magic!