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Shattered Realms Cosmology Overview

Sep 8, 2025

Overview

This thread presents "Shattered Realms," a custom cosmology designed for a D&D 5e campaign, detailing its planes, core metaphysical rules, and in-world mythologies. The discussion also includes clarifications and feedback from community members regarding the structure and logic of the cosmology.

Core Cosmological Structure

  • The multiverse is organized between two primal forces: the Source (origin of creation) and the Terminus (end of all things).
  • Druidic sects favor a top-down model, while clerics, warlocks, and wizards each hold differing cosmological interpretations.
  • Planes arise from the interaction and decay of primal energies between the Source and Terminus.
  • The structure involves hierarchical layers: Celestial Realms near the Source, Mortal Realms in the middle, and Lower Realms approaching the Terminus.

Key Planes and Their Functions

  • The Source radiates creation energy, filtered through intermediary planes before deities can harness it.
  • The Terminus absorbs all creation, providing entropic forces necessary for the breakdown and transformation of energies.
  • The Great Cycle dictates planar birth, maturity, decay, and ultimate destruction in a repeating loop.
  • Interstitial Planes (Astral, Ethereal, Shadowrealm, Plane of Mirrors) facilitate travel and connection between major planes, each with unique properties and hazards.
  • The Celestial Realms are reserved for deities and their direct servants, uninhabitable by lesser beings.
  • The High Heavens serve as afterlife domains for the faithful, eventually transitioning into Mortal Realms.
  • Mortal Realms constitute the majority of existence, inhabited by mortals and visited temporarily by celestials and fiends.
  • Inner (Elemental) Planes are specialized worlds based on elemental or abstract forces.
  • The Far Realms are vestiges from prior cosmic cycles, inhabited by alien entities mostly dormant.
  • Lower Realms, Hells, and Abyss are dominated by entropy, inhabited by fiends, and characterized by resource scarcity and soul-based economies.

Magical and Metaphysical Mechanics

  • Worship increases a deity’s capacity to store and use primal energy.
  • Magic is a byproduct of primal energy decay, with arcane magic regarded as fundamental by wizards.
  • Souls serve as primal energy containers and are traded, especially in the Lower Realms.

Community Feedback and Designer Clarifications

  • Formatting issues initially hindered readability but were resolved after user feedback.
  • Clarification provided that devils and demons can attempt to ascend the cosmological hierarchy, although it is difficult.
  • Planar transitions between layers (e.g., High Heavens to Mortal Realms) are significant and involve rapid energetic changes.
  • Questions were raised about redundancy among interstitial planes, their necessity, and potential for cross-world connections within a universe.

Questions / Follow-Ups

  • Community members sought more detail on how interstitial planes function when connecting multiple worlds or within a single universe.
  • Further clarification was requested regarding the differentiation and necessity of various interstitial planes.