Mistletoe," said Luna dreamily, pointing at a large clump of white berries placed almost over Harry's head. He jumped out from under it. "Good thinking," said Luna seriously. "It's often infested with nargles.
J. K. RowlingThe elf’s eyes found him, and his lips trembled with the effort to form words. ‘Harry... Potter...’ And then with a little shudder the elf became quite still, and his eyes were nothing more than great, glassy orbs sprinkled with light from the stars they could not see.
J. K. Rowling