Little Witch Academia - Season 1 Episode 5

While being forced to clean the academy's tower following an argument in class, Akko and Amanda witness a horde of dragons carrying off the Sorcerer's Stone, leaving Luna Nova without any magical power. Strangely, the academy staff does not react to this theft, instead accidentally revealing that this is part of an anticipated prophecy involving a dragon. After hearing a legend about a white dragon who resides in the nearby Ruins of Rastaban, Akko, Amanda, and their friends head there to retrieve the stone themselves. There, they discover the culprit to be a loan shark dragon named Fafnir, who has repossessed the Sorcerer's Stone from Luna Nova after their failure to keep up repayments on a loan he gave them. Luckily, Diana is able to decipher Fafnir's promissory note, written in dragon language, revealing that it does not actually mention paying back interest, meaning Fafnir has been tricking the school into paying back more than they actually owed. Caught in his deception, Fafnir is forced into nullifying the contract and returning the Sorcerer's Stone to Luna Nova.