Ron, Hermione and Harry were making bets on who would be crucioed first because their blood-thirsty ideas would make Tom snap. Currently, it was neck-to-neck between Bellatrix Lestrange and Augustus Rockwood. Where her blind adoration for her Lord was undoubtedly taxing, his insistence of all mudbloods being inferior was most vexing. In the end, it was Rodolphus Lestrange, since he was unable to control his wife and for repeatedly suggesting to simply storm Hogwarts and kill all muggleborn.