The Count of Monte Cristo from Azkaban

At seven years old, Dain Avery is wrongfully imprisoned in Azkaban, where he becomes cellmate to the infamous Sirius Black. On his first night, he stumbles upon an extraordinary discovery: cursing "Merlin's XX" literally summons anything connected to the legendary wizard—his beard, his stockings, his magic, even his bloodline and treasures. For four years, Dain systematically "fleeces" Merlin of everything he's worth, becoming the most resourceful prisoner in magical history. When his Hogwarts letter finally arrives at Azkaban, Professor Snape retrieves him only to find the boy's home destroye…