Mechanus

This plane is a single layer that extends infinitely in each direction. Mechanus is filled with an immense clockwork machinery that never ceases to tick. The abstract calculations performed by this machine are impossible to grok, even for greater powers such as Banor or Asmodeus. A cog in the machine averages 500 miles across, Each of these massive metallic disks is largely flat and has its own gravity. This gravity doesn't affect other nearby cogs, so the disks can meet perpendicular to each other without disturbing their function nor the creatures on its face. This gravity also works normally on the obverse face of a cog, but it is rare that two opposite sides are both occupied.
  All of this is representative of the true nature of Mechanus, a plane of Lawful Neutral and absolute order. It is the home of Otonor the Lost, and Primus the chief Modron.

Localized Phenomena

It is impossible to deceive someone with illusions or phantasms on this plane. Spells that produce these effects work, but the illusions are obvious to observers,   Flying over the edge of a cog and 'falling' results in the traveler floating similar to the Astral Plane, with a slight tug towards nearby planes.  
Optional Rule: Law of Averages
  While on Mechanus, creatures always use the average damage result for attacks and spells. For example, an attack that normally deals 1d10 + 5 damage always deals 10 damage on Mechanus.  
Optional Rule: Imposing Order
  At the end of each long rest taken on this plane, a visitor that isn’t lawful neutral must make a DC 10 Wisdom saving throw. On a failed save, the creature’s alignment changes to lawful neutral. The creature’s alignment reverts to normal after one day spent on a plane other than Mechanus. Casting the dispel evil and good spell on the creature also restores its original alignment.

Fauna & Flora

Only the Modrons are native to this plane.

History

Primus is often sought for advice by greater powers, since he is a powerful Lawful Neutral Deity. He is not immortal however, and the highest ranking Modron immediately assumes his role, portfolio, and name should he ever be killed or destroyed.
Alignment
Lawful Neutral
Type
Plane of Existence
Included Locations

Articles under Mechanus


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