Drawing her wand out of her pocket, Hermione raised it and closed her eyes, recalling the incantation:  Mutare Animus, Sensus Immuto, Sensus vim extermina.... She placed her left hand on Alecto’s; it helped her to feel Alecto’s mind and ground her magic, so that the right memories were erased with a modified memory implanted. A trail of purple light sparked from her wand, the color swirling to the crown of Alecto’s head. She moved the wand gracefully, as if conducting an adagio piece. She continued whispering the words, almost getting lost in a trance. She continued until the purple light grew dim, indicating the memory alteration had taken place.