But Harry didn't use the killing curse, he used Crucio. Bellatrix (sp) said that righteous anger wasn't enough to fuel the curse to cause sufficient pain.The Grumpy Celt said:Harry was unable to use the killing curse on the woman who killed Sirius because he did not hate her enough
KenM said:
Olgar Shiverstone said:So why wouldn't the Death Eaters use House Elf assassins?
Idle Speculation: What if Voldemort is HARRY'S Horcux!FireLance said:Idle speculation: what if Harry's scar (and not Harry himself) is the final Horcrux?
Melkor said:You see, Dumbedore believes that there is good with everybody, but sometimes even he might make mistakes.

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.