Legacy of the Seven Stars (七星の遺産 Nanahoshi no Isan) is a sealed object that can bring absolute destruction to the Tokyo Area.
A deadly object that can bring destruction upon the Tokyo Area, able to destroy the Monoliths encompassing the secluded areas. Seitenshi gives the Civil Security Corporation the duty to retrieve the case in which this object is sealed, which was engulfed in the Original Gastrea that invaded the Tokyo Area on April 28, 2031. The case had entered its body whilst the Gastrea began the process of Shape Corrosion. The Legacy of the Seven Stars is capable of summoning a calamity that can destroy the world, a Stage V Gastrea, otherwise known as the Zodiac Gastrea. The Legacy of the Seven Stars summoned the Model Scorpion, which was defeated by Rentaro Satomi.
It was later revealed that the case contained a broken-down tricycle, prompting an outraged Rentaro to question Seitenshi about how that was able summon Scorpio and what were the Gastrea in the first place. After being given level-5 clearance on top-secret information, Rentaro found out about the destruction of the Nanahoshi Village and connected it with the Legacy of the Seven Stars (Nanahoshi). 
- Black Bullet Manga: Chapter 5, Page 38
- Black Bullet Manga: Chapter 5, Page 11
- Black Bullet Manga: Chapter 9, Pages 20-21
- Black Bullet Manga: Chapter 9, Pages 22-23
- Black Bullet Manga: Chapter 20, Page 8
- Black Bullet Anime: Episode 9
|Everyday Items||Electronic Eye • Erosion Resistance Shot • Monolith • Varanium|
|Perilous Items||AGV Experimental Drug • Legacy of the Seven Stars|