Come out, come out, little Harry!" she called in her mock-baby voice, which...

Come out, come out, little Harry!" she called in her mock-baby voice, which echoed off the polished wooden floors. "What did you come after me for, then? I thought you were here to avenge my dear cousin!" "I am!" shouted Harry, and a score of ghostly Harrys seemed to chorus all around the room. "Aaaaaah... did you him, little baby Potter?"
Hatred rose in Harry such as he had never known before. He flung himself out from behind the fountain and bellowed "
"
Bellatrix screamed. The spell had knocked her off her feet, but she did not writhe and shriek with the pain as Neville had -- she was already on her feet again, breathless, no longer laughing. Harry dodged behind the garden fountain again -- her counterspell hit the head of the handsome wizard, which was blown off and landed twenty feet away, gouging long scratches into the wooden floor. "Never used an Unforgivable Curse before, have you, boy?" she yelled. She had abandoned her baby voice now. "You need to them, Potter! You need to really want to cause pain -- to enjoy it -- righteous anger won't hurt me for long -- I'll show you how it is done, shall I? I'll give you a lesson--!