Dungeons & Dragons Lore Wiki

The modron is a hierarchy of mechanical creatures appearing in Dungeons & Dragons.

Modron is pronounced "MO-dran".[2]



Personality and alignment

Abilities and traits





Life cycle


Society and culture

Relationships and family



Allies and minions









Ancient history

Recent history

Notable modrons

For a full list of modrons, see Category:Modrons.

Related creatures

Publication history

AD&D 1st edition

Modrons first appeared in the Monster Manual II (1e) (1983), p.86-91, by Gary Gygax.

They are mentioned in Manual of the Planes (1e) (1987), p.85-86, and make an appearance in OP1 Tales of the Outer Planes (1988), p.92-93.

They are given substantive mentions in The Ecology of the Spectator, Dragon #139 (Nov 1988), p.87-89.

AD&D 2nd edition

Modrons, including rogue modrons, appear in Planescape sourcebooks, given detailed statistics and description in the Planescape Campaign Setting (1994), p.16-24, and starring in The Great Modron March (1997). The modrons gain their iconic mechanical look in this edition.

They are mentioned in numerous other Planescape sourcebooks including A Guide to the Astral Plane (1996), p.93, A Player's Primer to the Outlands (1995), p.30, Dead Gods (1997), Doors to the Unknown (1996), Hellbound: The Blood War, The Dark of the War (1996), p.33, On Hallowed Ground (1996), p.51, Planes of Law (1995), and The Planewalker's Handbook (1996).

The spell summon modron I appears in Wizard's Spell Compendium Volume Four (1998), p.896-897, adapted from Polyhedron #18 (1984).

Modrons make a few appearances in non-Planescape works. A pentadrone appears in How the Mighty are Fallen (1996), p.31, and modrons are briefly attested in Spelljammer: Adventures in Space{{UnknownBook}}.

They are given substantive mention in The Plane Truth Part II: A Journey to the Outlands, Dragon #204 (Apr 1994), The Dragon's Bestiary, Dragon #221 (Sep 1995), p.77. Rules for rogue modron player characters appear in Planar Heroes, Dragon #235 (Nov 1996), while magic items of the modrons appear in Modron Magic, Dragon #241 (Nov 1997). The modron heartspear weapon appears in The Planar Armory, Dragon #272 (Jun 2000).

D&D 3rd edition

Modrons are only briefly mentioned in D&D third edition sourcebooks, with a passing reference in Manual of the Planes (3e) (2001), p.129. However, they appear in a number of magazine and web articles.

Modrons are detailed in the Manual of the Planes web enhancement, an 18-page free PDF titled The Modrons, by Mark Jindra. It provides full statistics for all five tiers of base modrons and all classes of hierarch modron except Primus. It cites as its sources Planes of Law, the Planescape Monstrous Supplement, and Scott Greene's fan conversion The Book of Modrons, which also included statistics for Primus.

The other major third edition source on modrons is the article Return of the Modrons, Dragon #354 (Apr 2007). A modron appears on the cover of that magazine.

Modrons make an appearance in the web-original adventure module Force of Nature{{UnknownBook}}. Modrons are mentioned in The Ties that Bind, Dragon #341 (Mar 2006), in reference to Primus as a vestige for binders, and briefly in Planescape article The Gatetown of Ecstasy, Dragon #351 (Jan 2007).

A tertian hierarch modron appears in the epic-level adventure Quicksilver Hourglass, Dungeon #123 (Jun 2005). Modrons are mentioned in The Clockwork Fortress, Dungeon #126 (Sep 2005). A tertian also appears in Diplomacy, Dungeon #144 (Mar 2007).


Modrons appear in the Living Greyhawk adventure modules COR3-14 Hunt for the Rogue and COR5-07 Rings Within Rings.

D&D 4th edition

Modrons did not appear in D&D 4th edition sourcebook, but were mentioned in digital magazine articles.

They are mentioned in the article Modrons' March in Bart Carrol's D&D Alumni article of January 26, 2011. They are detailed in the article Ecology of the Modron, Dragon #414 (Aug 2012), with stats for the rogue monodrone, rogue duodrone, tridrone, pentadrone, and nonaton. They are described in Creature Incarnations: Modrons, Dungeon #186 (Jan 2011), which provides statistics for the monodrone, duodrone, quadrone, and a modron hierarch.

D&D 5th edition

Modrons appear in the Monster Manual (5e) (2014), p.224-226, which provides statistics for the monodrone, duodrone, tridrone, quadrone, and pentadrone.

They are attested in the Dungeon Master's Guide (5e) (2014), p.66, with very cute art of a modron adventuring party appearing on that page. They are mentioned in the wild magic table in the Player's Handbook (5e) (2014), p.104.

The winged monodrone [[Gearbox][ appears in Lost Laboratory of Kwalish (2018). Monodrones and duodrones appear in Out of the Abyss (2015), while pentadrones and quadrones appear in Tomb of Annihilation (2017), p.177. A rogue quadrone appears in Waterdeep: Dungeon of the Mad Mage (2018), p.41, while replica modrons appear in Acquisitions Incorporated (5e) (2019), p.132.

The modrons are tied into other creatures in Mordenkainen's Tome of Foes (2018). They are attested in the Eberron setting in Eberron: Rising from the Last War (2019), p.229, as Daanvi.

Creative origins

The name Modron appears in Welsh folklore, where it is the name of the mother of Arthurian hero Mabon ap Modron. An early mention of the name in a D&D context appears in Dragon #44 (Dec 1980), p.75, referring to a Judges Guild sourcebook describing an area near the City State of the Invincible Overloard.

Reception and influence


  1. 1.0 1.1 Manual of the Planes (3e), Web enhancement (2001).
  2. Ay pronunseeAYshun gyd, Dragon #93 (Jan 1985), p.28.