Planar Convergences and Natural Gates – Foundry Campaign Compendium

by Elara Moonwhisper, 4602 AR

The Moonwhisper sisters arrived at related problems from opposite directions. Ellandren approached the elven Aiudara and asked what they revealed about the nature of planar transit and the architectural relationship between constructed gates and the planes they connect. Elara asked a prior question: before anyone built anything, before any civilization developed the knowledge or the need to construct a deliberate crossing, what was already there? Her book is an answer to that question, and the answer is more complex and more disturbing than the question initially suggests.

Elara Moonwhisper writes with unusual clarity for a scholar in this literature, which I note without irony. Understanding what she describes is not the problem. What she describes is the problem.

The Nature of Convergence Zones

A planar convergence zone is, in Moonwhisper’s framework, any location where the membrane between two or more planes has grown thin enough that the properties of each begin to affect the other without any deliberate transit occurring. The planes are not touching in the structural sense. They are adjacent in a way that the membrane between them cannot fully manage, and the pressure of adjacency produces effects on both sides that neither plane generates independently.

Moonwhisper documents three categories of convergence zone, distinguished by the number of planes involved and the permanence of the condition.

The simplest: a bilateral convergence between the material plane and one other. These are the most common and generally the most stable. The material plane’s convergences with the Plane of Fire produce desert regions of unusual geological activity and sporadic elemental manifestation that the local populations have learned to accommodate across generations. Convergences with the Plane of Shadow produce those territories, found in several northern and mountainous regions, where the quality of light is persistently wrong in ways that affect navigation, mood, and the long-term mental health of inhabitants. These are not dangerous by default. They are simply places where two sets of physical laws are negotiating with each other, and the negotiation’s terms are locally unusual.

The complex: trilateral or higher-order convergences, where three or more planes press against the same point of material reality simultaneously. These are rarer and significantly less stable, because the competing pressures of multiple adjacent planes produce interference patterns in the membrane that can shift, collapse, and reform unpredictably. Moonwhisper documents a site in the Mwangi Expanse where the material plane converges simultaneously with the Plane of Fire, the Plane of Air, and what she describes as “a third plane whose identification I consider preliminary and whose nature I am not prepared to characterize in print.” The local geography is extraordinary. The local mortality rate among researchers is also extraordinary.

What Border Realms Are

The most original contribution of Elara’s text, and the point where her work most directly extends her sister’s findings, is her documentation and analysis of what she calls border realms: the territories that exist within convergence zones, which are simultaneously of both planes and of neither.

This needs to be understood precisely. A border realm also sometimes called shard realms, although there is quite a scholarly debate about whether a shard realms is actually something completely different, is not the material plane with unusual atmospheric conditions. It is not a pocket of another plane that has invaded the material. It is a different thing, produced by the sustained pressure of two planes against each other, which has its own geography, its own physical laws, and its own ontological status. The border realm between the material plane and the Plane of Shadow that exists in the deep Rime Wastes is not the Rime Wastes with shadow-properties. It is a territory that operates according to principles drawn from both planes but identical to neither, and those principles interact with each other in ways that produce behaviors no scholar trained exclusively in either plane’s characteristics would predict.

Moonwhisper spends considerable effort documenting what these combined-principle behaviors actually look like in practice, because the theoretical description does not convey the experience. In a border realm with Shadow-material convergence: objects cast shadows in multiple directions simultaneously, none of them consistent with any light source. Sound arrives from the wrong direction and sometimes from a direction that does not exist in three-dimensional space. Distance behaves differently on the return journey than on the outward one, not in the sense that the path is longer or shorter, but in the sense that the relationship between movement and displacement is not fixed. The effort required to cross a border realm is not calculable in advance and is not reliably the same twice. Entities native to either of the contributing planes navigate border realms with different capabilities than they would have in their home plane: some capabilities are enhanced, some are suppressed, and some behave in ways that have no parallel in either plane’s normal operation.

The Dreamlands-adjacent border realms receive particular attention, partly because they are the most thoroughly documented in her survey and partly, I suspect, because Elara’s sister’s work had made the theoretical foundations of Dreamlands adjacency a family preoccupation. Border realms between the material plane and the Dreamlands produce conditions that Elara describes with the specific care of someone who has been to these places. The rules of probability shift: not toward the impossible but toward the improbable, with a consistency that suggests the probability-shaping qualities of the Dreamlands are bleeding into the material physics of the border realm. What a person expects strongly enough begins to have a mild influence on what occurs. This is not magic in the standard sense. It requires no training, no spell, no component. It is simply a property of the territory. The difficulty this creates for reliable navigation, survey work, and long-term habitation is left as an exercise for the reader.

On the Natural Gate Phenomenon

Where Ellandren’s work concerned constructed gates and their anchoring in the Dreamlands, Elara addresses what happens when convergence zones become sufficiently intense that they produce transit rather than merely influence. The natural gate is the extreme end of the convergence zone spectrum: a point where the membrane has not merely thinned but opened, where passage between the converging planes becomes possible without any constructed threshold.

Natural gates are not stable by default, which distinguishes them from the Aiudara and other constructed thresholds. They open and close on cycles that Moonwhisper spent years attempting to map and eventually concluded are not truly cyclical but responsive: the natural gate’s permeability is a function of the pressures on both sides of the membrane, and those pressures fluctuate according to conditions in both contributing planes that the observer on the material side cannot always detect in advance. A natural gate that was open last month may be closed this month and open again at a frequency that has no obvious relationship to any calculable period.

The practical problem this creates for travelers is obvious. The less obvious problem, which Elara addresses with the thoroughness of someone who has thought hard about scenarios she hopes will remain theoretical, is what happens when something passes through a natural gate in the wrong direction: when entities native to the adjacent plane, which did not choose to cross and may not be aware they have crossed, are deposited in the material world by a gate they did not intentionally use. Elara documents several documented cases of this. The outcomes vary by the nature of the entity and the nature of the convergence, but they share a consistent quality she describes as “the particular confusion of a thing that is not where it expects to be, in a space it does not entirely recognize, operating under physical laws that are similar enough to its home plane to be navigable but different enough in specific ways to be continuously surprising.”

This confusion, she notes carefully, does not reduce the entity’s capabilities. In some cases it enhances them, because the entity is applying its native physics to a slightly different context and the mismatch occasionally produces effects that exceed what either set of physics would generate alone.

The Increasing Density

Moonwhisper’s final and most unsettling finding: the density of convergence zones with the Dreamlands specifically has been increasing over the period of reliable documentation. Not dramatically. Not at a pace the casual observer would notice in a single lifetime. But measurably, consistently, in a direction that has not reversed. The Dreamlands are closer to the material plane than they were two hundred years ago. The border realms between them are wider. The natural gates are more numerous and more frequently open.

She presents this finding without a causal explanation and declines to speculate about one in print. Her sister Ellandren, in the Aiudara text, documents gates whose structural anchors in the Dreamlands have been compromised. Elara’s data suggests the Dreamlands themselves are approaching. Whether these two observations describe the same phenomenon from different angles, or whether they are distinct processes producing effects that coincidentally resemble each other, neither sister has stated publicly.

Chronicler’s Note: Elara Moonwhisper is, as of the writing of this entry, engaged in research she has declined to describe except to say it concerns the Q’illu Chants and their relationship to the specific experience of being in a Dreamlands-adjacent border realm when the convergence intensifies. I find this combination of facts unsettling. I also note that both Moonwhisper sisters arrived at related conclusions through entirely different methods, which is either very strong evidence or the kind of coincidence I have learned, in this field, not to trust.