Oryx is the most powerful Hive, the center of the system of tithing, the First Navigator, the King of the Final Shape, the Taken King. He holds a very powerful position. There is a massive power vacuum left in his place. Toland (who speaks in that card) is kinda pissed that you created that. If no one takes his place, there's just a vacuum. The Hive are left without a King. All the tithe that went to Oryx now sits stale. The other swords are probably made from the cores/hearts of generic Cleavers. Ours is the only one made from the Willbreaker's dark heart.