The Heart Rock

The Heart Rock was situated in the middle of the Sanctaphrax Rock's stonecomb. Inside the Heart Rock, there were three chambers, the Treasury Chamber, the Guard Chamber and the Ancient Laboratory.

• The Treasury Chamber was where the Stormphrax was kept to make sure the great floating rock is kept from breaking away and floating off into Open Sky. In the First Age of Flight, Knights Academic were sent out to collect Stormphrax from the Twilight Woods, to put into the Treasury Chamber as the rock grew more buoyant. Before the Great Purges, the Treasury Chamber had been the Great Laboratory, the Earth-Scholars' main center of study and experimentation in early Sanctaphrax.

• The guard chamber was where the Treasury Guard waited for their shift, which was their turn to guard the Treasury Chamber, some slept, others played games and of course some were on duty.

• The Ancient Laboratory was the sole birthplace of life created outside of Riverrise. In the First Age of Flight, Linius Pallitax attempted to create life there, just as the first scholars did- yet he succeed. He had created the Gloamglozer. Later, in the Third Age of Flight, Nate Quarter and his friends discovered, when Sanctaphrax returned, that the original Gloamglozer had been using the Ancient Laboratory to create more of its kind to rule Sanctaphrax and bring good citizens to their deaths. Ambris Hentadile destroyed the Ancient Laboratory with his Phraxpistol.