Blaise was one of the students who received an invitation from Professor Horace Slughorn to join him for lunch on the Hogwarts Express journey, which might imply that none of Blaise's relatives were Death Eaters, as Slughorn wanted nothing to do with them (it was the reason why he chose not to invite Theodore Nott to join the Club). Slughorn was sizing up the student body for potential new members of his famous Slug Club, which he started when he last taught at Hogwarts. During the meeting Blaise seemed quiet as usual and did not join in the discussions; he did, however, give a little cough of "amused scepticism" when Slughorn told the group that he thought Harry Potter had powers beyond the ordinary. This caused him to provoke Ginny Weasley to snap at him, and Slughorn jokingly warned Blaise not to fire Ginny up again, remembering how well she could cast a Bat-Bogey Hex. When questioned on his family, Blaise talked about his mother and the line of husbands she had who had all left her pots of galleons in their wills after they died, all of which were suspicious deaths.