Clarke is Skaikru, they are not Grounders. They were not raised with the cultural significance, only the logic of what the blood is.
[ Never doubt how uncomfortable talking about this with an outsider makes her, but Lexa is determined to grow outside of those limits. But the Flame she will never discuss.]
The survivors of the Praimfaya, the nuclear apocalypse, were given the Nightblood to survive the radiation. They were our ancestors. But as they bred and established themselves, not all of their children and grandchildren were born with the same blood. It was recessive. They all have enough resistance to survive on earth, but only the Nightbloods can survive radiation on the level of a Praimfaya. When a child with the black blood is born, they are sent for training to be our next leader. You could say it is a royal bloodline.
no subject
[ Never doubt how uncomfortable talking about this with an outsider makes her, but Lexa is determined to grow outside of those limits. But the Flame she will never discuss.]
The survivors of the Praimfaya, the nuclear apocalypse, were given the Nightblood to survive the radiation. They were our ancestors. But as they bred and established themselves, not all of their children and grandchildren were born with the same blood. It was recessive. They all have enough resistance to survive on earth, but only the Nightbloods can survive radiation on the level of a Praimfaya. When a child with the black blood is born, they are sent for training to be our next leader. You could say it is a royal bloodline.