Draco Malfoy's Rivalry and Schemes
Harry Potter and the Prisoner of AzkabanMalfoy's ongoing antagonism toward Harry, including his attempts to get Hagrid fired and sabotage the Quidditch match.
increasing
Bearing strength in each event
decreasing
Malfoy's provocation at the match

The Fake Dementors
The Plot
Malfoy, along with Crabbe, Goyle, and Flint, dresses as Dementors to scare Harry during the match. They hope to cause him to fall off his broom again. The plan nearly works, but Harry is prepared and casts a Patronus.
The Exposure
Professor McGonagall discovers the trick and is furious. She gives Slytherin a fifty-point penalty and detentions. Malfoy is humiliated. The Gryffindors laugh at him.
The Aftermath
Malfoy's scheme backfires, and he becomes more determined to undermine Harry. The rivalry intensifies, leading to further conflicts.
Malfoy's injury and complaint

The Hippogriff Incident
The Insult
Malfoy deliberately insults Buckbeak, calling him an ugly brute. The Hippogriff attacks him, slashing his arm. Malfoy immediately milks the injury, claiming it is serious.
The Complaint
Malfoy writes to his father, Lucius, who pressures the school governors. A complaint is filed, leading to Buckbeak's trial. Hagrid is devastated, and Malfoy enjoys the power he has.
The Grudge
Malfoy holds a grudge against Harry and Hagrid. He taunts them about Buckbeak's fate. The conflict between Harry and Malfoy is a constant thread throughout the year.
Gryffindor vs. Ravenclaw
First Care of Magical Creatures lesson