Mechanus

History The abject plane of law has existed since the dawn of time. Once, it was but an endless void, as were most of the outer planes. But as matter was slowly introduced, it was transformed and organized into ordered and principled material.   Over the eons, inorganic material was coalesced into perfectly collected and categorized groupings. In time, the stewards of Mechanus, the living constructs called modrons, took these materials and began crafting them into massive cogs and gears; all to power a grand machine of unknown scope and purpose.   Now, Mechanus is comprised of two biomes: the border realms, that are still the empty vacuum the plane began as, and the realms of Clockwork, which the modrons slowly but steadily expand into the infinite void; forming raw materials that float through the ether into more cogs for their machine.   The Grand Design The modrons do their work and build their incalculable machinations at the behest of their lord and so-called creator: Primus. Primus' grand directive for the modrons is to discern the vary nature of the universe and calculate its immutable laws.   To that end, the modrons continue to build out the Clockwork Realms for two reasons: to bring law and order to the border realms, but more importantly, to continue to add computing power to their grand machine that seeks to analyze every aspect of the cosmos.   All of Mechanus' machinery ultimately leads back to the realm's central hub: the Grand Modron Cathedral, located within the plane's Spire at the base of the gear that comprises the realm of Regulus. It is here where Primus sits and contemplates the meaning of all things, life, and the universe.   Realms Mechanus is comprised of an uncountable array of cogs and gears, many ranging in size from islands to whole provinces, and almost all of them houses a realm occupied by both the modrons that maintain them and other denizens that have found there way there to live in perfect harmony with the rest of the plane.

• Regulus. One of the two central most cogs that rotate around the Modron Spire, the base of which houses the Great Modron Cathedral
• Fulcrum. The other half of the two central cogs, though Fulcrum resembles a 12-spoked wheel that looms overtop Regulus. Fulcrum is often called "The City of Doors," as each spoke of the great wheel is covered in doors that lead out to each spoke's corresponding Plane of Existence. The Hall of Concordance, home of the contract-enforcing Inevitables called Maruts is located at the base of the Spire here.