Mediator

(From Planescape: Monstrous Compendium Appendix I - 1994):

Mediators are proxies of the powers of neutrality.

Mechanus Mediator:

Mechanus mediators, the balancing forces found in the Clockwork Universe, ensure that all things, light and darkness, liquid and solid, maintain perfect balance and harmony. They look like clusters of geometric shapes made of strange green crystal. They are roughly spherical in shape, prickling with protuberances: squares, triangles, trapezoids, and spheres of all sizes stick out in all directions.

Unlike their lesser kin, the translators, Mechanus mediators communicate through empathy. They cannot communicate with undead.

Combat: Mediators rarely enter combat except to balance an ongoing battle. They attack with a piercing green ray of light that inflicts 2d12 damage and ignites combustibles. The ray has no range modifiers; the mediator can attack anything it can see.

Mechanus mediators can create or do anything as long as it directly relates to maintaining balance in Mechanus. For game purposes, this means that they have unlimited wish spells, but only for the purpose of balance. For example, if the amount of liquid in Mechanus begins to exceed the amount of solid matter, a mediator can transform liquid to solid until balance is restored. If two groups battle, the mediators can destroy combatants until the sides are equal or even telekinetically stop the battle. Given their omnipotent power, it is perhaps fortunate that only three mediators exist in Mecbanus.

Because their own destruction is the greatest possible threat to balance, Mechanus mediators use their wish ability to save themselves from danger. Without conscious effort mediators can affect any attacker, no matter where or in what manner the attack is launched. The attacker immediately undergoes an alignment shift to absolute neutral and, therefore, ceases its attack. Simply put, a mediator cannot be killed, so they have no experience point value.

Habitat/Society: The sole purpose of the mediators is to maintain balance. It is irrelevant whether the balancing is of good and evil, light and darkness, liquid and solid, etc. The mediators are heedless of anything except this symmetry of existence, even of sapient life. This causes some to view them as evil and uncaring, but mediators are certainly not evil in this respect. Rather, they are amoral in their drive for perfect equilibrium.

Mediators have gained an almost godlike reputation in Mechanus. They are rarely seen, and when they appear it is generally to effect tremendous change in the name of equilibrium. Even those beings of true neutral alignment are not beyond slight error or deviation. Neutrality tends to be inhibited, in some cases, by emotion. The mediators, however, are neutrality unfettered by emotion. They are objective judges, free of bias.

Ecology: A legend of the mediators, its origin and truth lost in the mists of time, claims that eons ago when the Outer Planes were first forming, the powers of creation divided space among them. They created planes of certain alignments as homes for the corresponding powers. Intense arguments between powers of the same alignment but slightly differing viewpoints led to the creation of 17 individual planes for the nine alignments.

When the Outlands were created, they were to be the home of the neutral powers. From there they could send out their influences to maintain balance and order. But the neutral powers bickered because they disagreed how to organize and construct the inner areas of the plane. Each tried to exert individual influence, causing the plane to become unbalanced.

When the powers of creation saw what had happened, they cast the powers of neutrality out of the Outlands, thus closing it off to all beings. They created Mechanus with its perfect harmony and giant clockwork, and sent the powers of neutrality there to live. In order that the neutrals not corrupt Mechanus as they had done with the Outlands, the powers of creation made the mediators and gave them great power and influence over balance. Three mediators were made, one for each of the Lights of Balance that shine now at the center of the Outlands.