Mechanus

Mechanus is a world of giant cogs that hover in space at all angles, all interlocked and turning according to their measure. The cogs seem to be engaged in a calculation so fast that no deity can fathom its purpose. They range in size from miniscule to hundreds of miles across.

The gravity on the disks of Mechanus always pulls towards the surface regardless of its relation to other cogs.

The magic of the plane causes everyone to always speak the same language.

Illusions of all types automatically fail on this plane and creatures cannot roll on the wild magic surge table. 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.

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 becomes 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.