Board Thread:Off Topic/@comment-26397825-20151211051732/@comment-26397825-20151214072838

That makes more sense than literally tapping into the souls of their ancestors. Basically, their semblance would be reading their genetic memory to use a semblance of someone from further up their line.

But then it comes to the whole; doesn't that mean they can use all semblances? Go back far enough, and you'll find most people ar related somehow which means they have a wide variety of semblances to choose from, which can make them OP. Especially if they start switching semblances in the middle of a fight. "Look, I have super speed. And now I have super strength. And now I can reflect all your attacks back at you. And now I can move things with my mind."