In Black Panther, during the ritual they have to strip-away T'Challa's power before he can compete with M'Baku for the throne. But, why does he have the power in the first place? Didn't he have to earn it or did he just inherit it from his father?
Even during Civil War, he had the power but it seems his coronation happens after it, so why did he have that power before even becoming the king?
Did this also happen in comics in the same way or only in the movie?