Nonatons were the second-lowest rank of hierarch modrons in the modron hierarchy.[3]


There were exactly 81 nonatons in modron society. They acted as captains and chief inspectors of the pentadrone police force. One served each sector, nine served the tertians, and the remaining eight reported directly to Primus himself. Each nonaton had twelve pentadrone lieutenants, each of whom commanded twelve quadrone sergeants, who in turn each commanded twelve tridrones.[3]



  1. 1.0 1.1 1.2 1.3 Mark Jindra (2001-09-21). The Modrons (Zipped PDF). Wizards of the Coast. pp. 11–12. Archived from the original on 2016-11-01. Retrieved on 2018-09-09.
  2. David "Zeb" Cook (1994). Planescape Campaign Setting, Monstrous Supplement. (TSR, Inc), pp. 16–18,20. ISBN 978-1560768340.
  3. 3.0 3.1 3.2 Gary Gygax (August 1983). Monster Manual II 1st edition. (TSR, Inc), p. 89. ISBN 0-88038-031-4.


Mechanical Beings of Inherent Order
Base Modrons: MonodroneDuodroneTridroneQuadronePentadrone
Hierarch Modrons: DecatonNonatonOctonSeptonHextonQuintonQuartonTertianSecundus
The One and the Prime: Primus