The Archmage Returns (OP Mage, Progression Fantasy, Magic Academy)

Alex Devine was the most powerful mage who ever lived. Then he made a deal to go back. Now he's a first-year student at WillStrife Academy with a will score of five thousand and four years to save everyone he ever knew. All he has to do is blend in, keep his powers in check, and not accidentally level the city. But something is wrong with the timeline he returned to. Classmates and teachers who never existed. Threats that shouldn't be here yet. Even Witless William is acting strange. Something is moving faster than he expected — and it knew he was coming before he did. WHAT TO EXPECT: - Overpowered MC hiding in plain sight - Magic academy life - A time travel mystery  - EXTREMELY light LitRPG system - Slow burn - Roughly 1,500 words a chapter, Monday through Friday