The Locked Tomb’s meant to house the one true enemy of the King Undying, Nav, something older than time, the cost of the Resurrection; the beast that he defeated once but can’t defeat twice. The abyss of the First. The death of the Lord. He left the grave with us for our safekeeping, and he trusted the ones who built the tomb a myriad ago to wall themselves up with the corpse and die there. But we didn’t. And that’s how the Ninth House was made.”