The three friends discover that Hagrid is raising a baby dragon, which is against wizard law, and arrange to smuggle it out of the country around midnight. Draco, hoping to get them into trouble, tells Professor McGonagall. Although the dragon is safely away, they are caught outside of their dormitory. Harry, Hermione, Draco, and Neville (who, trying to stop Harry and Hermione after hearing what Draco had been saying, was caught by McGonagall as well) are punished by helping Hagrid to rescue a เพื่อนทั้งสามคนพบว่าแฮกริดจะเพิ่มลูกมังกรซึ่งเป็นตัวช่วยสร้างผิดกฎหมายและจัดให้มีการลักลอบนำมันออกมาจากประเทศประมาณA few weeks later, Harry learns from Hagrid that the dragon egg was given to him by a hooded stranger who had asked him how to get past the three-headed dog, which Hagrid had admitted was easy – music sends it to sleep. Realising that one of the Philosopher's Stone's defences is no longer secure, Harry goes to inform Professor Dumbledore, only to find that the headmaster has just left for a meeting in London. Harry concludes that Snape faked the message that called Dumbledore away and will try to steal the Stone that night.