The Coldharbour castle had many vampires, not only vampires but other races too! Everyone who lived under Hephas's control went there — well, not everyone but those who had the time and nothing better to do.
It was a ceremony to introduce Arthur to the Coldharbour family, with food, drinks, music, and many other types of enjoyment.
"I don't like these types of things," Arthur said to Hephas, who was beside him, sitting at the main table.
"You do? Well, I can announce you now, and then you can escape the party if you want."
Hephas got up and called everyone to get their attention, saying the Coldharbour had a new member, Arthur. He then said a few words to convince everyone Arthur was decent, strong, and an excellent new addition to the family.
It worked as no one asked a thing. The people yelled and kept drinking their wine and dancing. Maybe Hephas's tactic was to get everyone drunk before announcing it.
"Clever," thought Arthur.