from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. # A set of seven works of art that are connected, and that can be seen either as a single work or as seven individual works. They are commonly found in literature, film, or video games.
From hepta- + -logy, in imitation of trilogy. (Wiktionary)
The final word, “scar,” might not refer to the one on Harry’s forehead, then, but to a new mark that appears on another person, now the bearer of Harry’s purified soul — and perhaps the protagonist of a lucrative new heptalogy.