Eternal Night Prison, or maybe... Land of Eternal Night.
Speaking of this distant homeland, Seredon's mood was complex with time. He was one of the few present, and in the entire earthly world, who understood the Land of Eternal Night best. It was he who personally buried his father, the Night King, and the remnants of the Night Race into that dark place.
"Olivia made a mistake, which created the Regent King. Afterward, the Regent King, over long years, found the road to the Land of Eternal Night and met with the Night King, gaining the opportunity for second blood donation."
Bologue spoke while looking at Serey, "This means that now the bloodline purity of the Regent King should be at the same tier as yours. More importantly, his Alchemy Matrix is far younger than yours."
Serey scoffed lightly. Even though he had fallen into such a state, deep down, he still possessed the unique pride of a Night Race Lord, even if his domain was long gone.
