The scabbard of the Minghong Knife and the millions-strong Long-toothed Rat Swarm are the Wanyan Family's key trump cards. With these two things, the Wanyan Family can guarantee absolute invincibility even within the Unity of Heaven and Man Realm. As long as there are no masters who transcend this realm, they have nothing to worry about.
In the present world, it is estimated that only the Knife Saint, the figure who has lived for three or four hundred years, has the power to transcend the Unity of Heaven and Man Realm. It's impossible for anyone else to possess this strength. So, for the Wanyan Family, these two trump cards alone are enough to dominate the world, let alone annihilate the Sword Saint Sect!
