Krum Attacks Cedric with the Cruciatus Curse
Pages 626-628
Harry stumbles upon Viktor Krum using the Cruciatus Curse on Cedric Diggory. Horrified, Harry stuns Krum and helps Cedric recover. Despite being opponents, Harry and Cedric agree to send up red sparks to mark Krum's location for rescue, signaling his disqualification.
