Xenophilius's public support of Harry Potter eventually got him in trouble with Death Eaters, who kidnapped his daughter and held her hostage at Malfoy Manor; Xenophilius intended to do whatever it took to get her back. Thus, when he was visited by Harry Potter, Ron Weasley and Hermione Granger later in the year, Xenophilius alerted Death Eaters, hoping they would return Luna in exchange. While waiting for the Death Eaters' arrival, Xenophilius told the trio about the Deathly Hallows. When they grew suspicious of him after realizing that Luna had not been home in some time, Xenophilius attempted to stun Harry and his friends, but missed, hitting an Erumpent horn and causing his house to collapse. The Death Eaters Travers and Selwyn arrived and briefly tortured Xenophilius, believing that he was trying to trick them about Harry being at his home. After Homenum Revelio revealed that there were others in the house, the Death Eaters sent Xenophilius up the stairs. Hermione rapidly wiped his memory of what they had discussed with him, and then blasted a hole through the floor to facilitate the trio's escape, engineering it so that the Death Eaters saw that Harry was indeed there, thus ensuring that neither Xenophilius nor Luna were punished for lying, and so that neither saw Ron, who was supposed to be at home sick with spattergroit.