One of the best parts of A Knight of the Seven Kingdoms is its focus on honor. Sigils are a big part of A Knight of the Seven Kingdoms, with Ser Duncan designing his own as a hedge knight. The Case Of The Missing Targaryen SigilsPersonal sigils also don’t appear in A Knight of the Seven Kingdoms. HBOSo how come none of these made it into A Knight of the Seven Kingdoms? A Knight of the Seven Kingdoms is now streaming on HBO Max.