The ribs that had formed the dome stretched endlessly upward, converging into a grotesque, hundred-meter-long spine of bone.
The bone walls on either side of the Fortress extended outward, transforming into two forelimbs also pieced together from countless skeletons.
The black-robed envoy had, at some point, appeared atop the Fortress. That spot was now the crown of a massive skull.
Within just a few short minutes, the Bone Fortress had come completely to life.
It had transformed into a massive White Bone Giant Beast.
It possessed the torso of a giant tortoise, the limbs of a lizard, and a terrifying, grotesque head fused from over a hundred skulls.
As it walked, innumerable faint blue Soul Fires flickered in and out of existence within the gaps of its bones, like will-o'-the-wisps in the night sky.
This colossus took heavy strides, marching forward.
It changed direction, heading step by step toward the northeast of the swamp.
