The endless banquet table at the heart of Khepri's temple, covered by something that moves but isn't a blanket.
Rosetta warned that Khepri's temple is an infinite table and that once inside, the raiders had to move fast and not let anyone run. The Visual Analysis screenshot bore her out: a long, long table stretching off into darkness, its entire surface appearing to be covered with a moving blanket.
Only it wasn't a blanket. Carl registered the wrongness without resolving it before the breach, and on entering was told he had been denied a table at the feast — framing the table as a place of divine hospitality he had been explicitly excluded from.
A table of unbounded length receding into darkness, its whole surface crawling with a moving covering that only resembles a blanket.
The central feature of Khepri's temple and the seat of the feast Carl is denied.