Roy Thomas and Frank Robbins featured Jacqueline Falsworth in "Invaders" #7-9 (July–October 1976). In the story she is drained of blood by her vampiric uncle, Baron Blood, as part of his plan to take revenge against her father, Lord Falsworth. Thomas and Robbins concluded the plot-line in "Invaders" #11 (December 1976); in the story a life-saving transfusion from original Human Torch Jim Hammond reacts with the vampire bite to give her super-speed, which she uses to take her recently invalided father's place on the team.