It took a team of healers from St. Mungo’s a whole week to break all the curses that Harry had been afflicted with, and he pretended the whole time not to know what had happened. "I must have accidentally touched a cursed artifact browsing one of the junk shops by Knockturn," he said with a sheepish laugh, while privately admiring the ingenuity and sheer daring that it took for Tom to have researched and cast all those illegal spells without detection.