|“||Quote? You desire a quote? The One and the Prime does not give 'quotes'.||”|
|— Primus to a record keeper of the Fraternity of Order|
Primus was considered a greater deity in Mechanus. His power over the modrons was absolute. All modrons obeyed the orders of Primus and carried out his plans. He was totally immune to all magic, and could issue telepathic commands to all modrons on Mechanus.
Primus, although godlike, could be killed. Whenever slain, the highest-ranking secundus modron was promoted to his position and became the new Primus. In the modron society absolute law was committed by all modrons with the rare exception of a rogue. 
Primus was killed by Orcus during the demon lord's quest to become a deity. Even after being replaced by one of his secundi, the mind of the previous Primus remained present in the multiverse in the form of a vestige.
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- Mark Jindra (2001-09-21). The Modrons (Zipped PDF). Wizards of the Coast. Archived from the original on 2016-11-01. Retrieved on 2018-09-09.
- ↑ 1.0 1.1 David "Zeb" Cook (1994). Planescape Campaign Setting, Monstrous Supplement. Edited by David Wise. (TSR, Inc), pp. 16–22. ISBN 978-1560768340.
- ↑ Gary Gygax (August 1983). Monster Manual II 1st edition. (TSR, Inc), p. 91. ISBN 0-88038-031-4.
- ↑ 3.0 3.1 Frank Mentzer (January 1985). “Ay pronunseeAYshun gyd”. In Kim Mohan ed. Dragon #93 (TSR, Inc.), p. 28.
- ↑ Monte Cook, Colin McComb (1997-10-28). The Great Modron March. Edited by Michele Carter. (TSR, Inc.), p. 12. ISBN 0-7869-0648-0.
- ↑ slade (1996). How the Mighty Are Fallen. (TSR, Inc), pp. 3, 31. ISBN 0-7869-0537-9.
- ↑ Matthew Sernett (March 2006). “The Ties that Bind: A Primer on Pact Magic”. In Erik Mona ed. Dragon #341 (Paizo Publishing), pp. 72–73.