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Also known as "Retarded System: Another Day as Harry's Classmate" Fallin, a mediocre rookie wizard in the wizarding world, spent eight years in silence at Hogwarts. Finally, one day after Harry entered the school... The door that has been waiting for eight years opens. [It is detected that the host has traveled through the magic world, and the most powerful magic system is being bound] [Current mission release: Pass the selection of the Sorting Hat and enter Gryffindor House] "System, do you want to see what you are talking about? I have become a teacher, how can I enter Gryffindor?" [Get Hermione's approval and establish a good relationship with her] [Get Principal Dumbledore's attention and approval] [Help the three Harrys subdue the escaped troll, ease the conflict between the three, and win extra points for Gryffindor] Fallin looked at Harry climbing on top of the troll and shouted without hesitation: "Come on! Five points for Gryffindor!" [The mission has been completed, and you have received rewards: Calling God Guard, Divine Edge Shadowless, and the proficiency of the phantom transformation spell has been increased to Lv3] Falin's eyes looking at the system instantly became kind. "A good system, you must have a system. This kind of conscientious system is really rare nowadays..." ... Many years later, the principal of Hogwarts and the president of the Order of the Phoenix, the guardian of the Philosopher's Stone, the most powerful Auror, who personally killed Lord Voldemort, and the most powerful wizard in the wizarding world, Lord Fallin, when asked how to become the most powerful wizard... Falin smiled slightly: "I've only done three things in my life." "Fool the system, fool the system... It's still a fucking system!"