Christmas shopping is tough. What do you get for the person who has everything? I’ll tell you what: a human sacrifice. Because:
A) they may have never had one done for them, and when they freak out and scream, “Sweet Lord, what are you doing?” You can say, “See? I KNEW you didn’t have EVERYTHING!” Also, up close, it’s a very impressive thing, with all the wailing and bloodshed, you might make a convert of them!
and B) if they really have everything, they MAY be some sort of immortal being capable of conjuring objects at will. And immortals love, love, love human sacrifices.
See? Your bases: covered. Merry Christmas!