Gear

This plane is filled with what feels like an infinite number of country-sized circular interlocking gears which are habitable on one side. These great flat wheels are at least 100 miles in diameter and have teeth that meshed at right angles, all turning slowly in synchronicity. Each disk has its own gravity that operates in a sphere circumscribing it exactly and pulling normal to the top and bottom surfaces. The void between the gears is filled with air, allowing easy flight. Outside a gravity sphere, objects feel only very weak attraction to nearby disks. A plane of Law and order, Gear has equal amounts of light and dark, heat and cold, and equal measures of the four elements. There is a place for everything and everything is in its place. Even individuals living here existed to fit into the greater scheme of things and thus achieve a perfect society. There is no pain, only the pleasure of successfully filling a role like a gear in a machine. Passion, fantasy, and illusion do not exist here, except for what might be brought in by visitors, and any who try to foment individualism or stir passions for a cause soon find themselves being confronted by the Modrons and facing the harsh laws of Gear.

The Great Modron March

Every 17 Grand Cycles, the Modrons perform a massive march through all of the planes on The Endless Road . A single Grand Cycle is the time it takes the largest gear to rotate once, which is what the inhabitants of Gear view as a year. Every 17 Grand Cycles, that is roughly 289 years for those who live in places like Sigil or the Material Planes, a march begins. Once 17 Grand Cycles has passed, the Modrons, as commanded by Prime, form into a massive march and begin their tour of the planes. They travel in and out of the Outlands and their travels take them through each of the Outer Planes, starting with the Silver Gates and then journeying to Cloud , then Heavenly Peaks , then Arcadia , then Beastlands , then Nimbus Forest , then Oblivion , then Limbo , then Pandemonium , then Abyss , then The Burning Ocean , then Inferno , then Undying Cinder , then The Pit , then Savage Fields and finally back home to Gear . No one is sure why the Modrons march, but it is no secret that over a thousand of Modrons begin the march, and during their long march more come back to Gear. Other travels of the road that find themselves caught during this march are either forced off the road or swallowed up by the marching Mordons. This is only time in history that Rajek, the Wanderer allows the rules of the road to be broken.

Locations

Regulus

The home of the Modrons and their deity, Prime, who resides in a pool of energy at its center. There are always 64 cogs in Regulus, and the Modrons are tasked with overseeing the cogs and defending the cogs from any who would seek to invade. Here in Regulus order is carried out in perfect unison, and those who interfere with its sequences soon find themselves removed. In Regulus the study of the infinites-juris, which is the study of mathematical law and its infinitudes, is held above all else. Scholars from all over the multiverse come to study this interlocking process of laws. There are also rumors that the All Turning Wheels is located within the great library of Arithmetic on the center cog of Regulus.

Delon-Estin Oti

Sitting in the center of a massive cog is a city with 20 perfectly symmetrical walls and a single gate to enter the town. Here, farmers till the land, tend to their animals and live in relative peace with the rest of Mechanus. This city, perfectly laid out like a spider web, is for any who seek freedom from their passions and they make their home here, and all are welcome so long as they follow the laws.