Harry Uses an Unforgivable Curse on Bellatrix

PAGES: 810-811

As the pursuit continues, Harry attempts to cast the Cruciatus Curse on Bellatrix in his anger over Sirius's death. Although Bellatrix is hit, the curse does not fully work because Harry does not truly want to cause her pain. Bellatrix taunts him, revealing that using Unforgivable Curses requires true desire to harm.