Ammonite arrays provide the Wise with the ‘computational’ resources they need to perform complex calculations—for example those that predict the arrival of the Rains in Osrakum.
Ammonites seated in ‘arrays’, stretching up the walls of specially constructed cells, are used as computational elements, and are fed ‘programs’ by Sapients by means of their homunculi. These programs are run in parallel by many cells controlled by Sapients, the ‘computation’ being co-ordinated by arrays of Sapients of the Domain Rain. By this means, for example, information gathered from the network of watchtowers covering the Guarded Land is collated and compared with that that has been archived over millennia.
These cells are located in the ancient Halls of Thunder.