According to the speaker, the Black Knife Assassins are "scions of the eternal city," who are kin with close ties to Marica, and of the same stock. They are described as descendants of the Eternal City.
This video delves into the lore of the Black Knife Assassins in Elden Ring, exploring their origins, nature, and connection to Marika and the Eternal Cities. It examines their physical and spiritual composition, their role in the Night of Black Knives, and how their form and abilities may have evolved.
The Black Knife Assassins are described as scions of the Eternal City. They are closely related to Marica and of the same stock. This means they are descendants of the Eternal City. The video also elaborates on the meaning of "scion" in Elden Ring, indicating it merges the concepts of a plant cutting, progeny, and royalty. This kinship and origin tie them directly to Marica and the powers associated with the Eternal City.