Magic Loser? I Used My Useless Magic to Overwhelm the Whole Place

Ella, who has been the weakest person in the magic academy for thousands of years, comes from a declining magic family. She can only cast the "lowest abandoned magic" and is ridiculed and humiliated. Until I picked up the deformed little magic pet briquettes and accidentally activated the [Reverse Magic System]! The more "useless magic" others look down upon, the more slippery she uses it, and the more severe the reward will be! Are classmates laughing at you? Teacher gives up? Relatives adding insult to injury? Use "waste magic" to slap them all in the face! Winning the college competition unexpectedly, showing off his skills in outdoor adventures, and unexpectedly breaking the family seal. It turns out that "waste magic" is actually a simplified version of ancient magic! The demons invade. See how Ella uses outrageous magic such as "frozen bread", "crooked flame" and "pumice stone" to join hands with briquettes to save the magic world and become a boss that everyone respects!