This can contain spoilers of Fire Emblem Genealogy of The Holy War so if you havent played that i recommend you to not look at it.
You know there are 12 Holy weapons in this game. But you are unable to use some of them. And these are usable by enemy. But in this game you kill these enemies. I was wondering these people had major holy blood and no one else(expect ıf their parents or children are alive) has that. For example Burian can use Helswath and he is the only one who can use it. But you kill him and there is only one left who has Neir blood(Johan or Johalvier) but its minor. So are these weapons useless now? Because no one has major holy blood or is there a way to make major blood children?