Scarwall's fourth floor opens onto the upper structure of the fortress, where enclosed stone rooms meet exposed roof sections and tower architecture. A prominent circular chamber forms the center of the level, while adjoining rooftops, broken edges and narrow connections create a dramatic change from the lower interior floors. The height is visible in the layout itself, making movement feel more exposed and dangerous.

This floor is built for encounters where position matters as much as raw space. The circular room provides a natural set-piece arena, while roof edges and narrow approaches punish careless movement. Characters can be forced between the relative safety of the tower interior and the vulnerability of the open upper works. In Skeletons of Scarwall, it gives the fortress a convincing vertical progression and a strong sense that the party has climbed into its most exposed reaches.