Talk:Season Six/@comment-83.185.243.103-20181113110441/@comment-26033829-20190128064111

You're missing a big point : the serum was created to survive radiations for people who lived before the apocalypse, people like Diyosa's crew or mount weather. Grounders and Skykru got an immunity to them, not like a nightblood but enough to survive high radiations. A planet with 2 suns doesn't mean a radiation level like the death wave. So it's possible they don't need serum at all.