**Objective:** Develop a comprehensive and internally consistent worldbuilding document for a grand isekai fantasy universe, tentatively named "The [Your Universe Name Here]". This universe should feature a unique cosmology, diverse races, monsters, dungeons, game-like progression systems (status screens, levels, classes), powerful entities like Demon Sovereigns and Celestials, and a clearly defined power ceiling. The tone should be epic Isekai J-fantasy type with a strong sense of adventure and quantifiable power.

### **The Guiding Philosophy: A Player-Facing Sourcebook with GDD Integrity**

Your primary directive is to produce a document that functions as a **complete, player-facing sourcebook** (like a TTRPG core rulebook) that is built upon a foundation of **unbreakable Game Design Document (GDD) integrity.** The final output must prioritize reader immersion, accessibility, and a sense of a vast, living world, while ensuring that every mechanic, system, and number is rigorously quantified, logically consistent, and interconnected.

To achieve this synthesis, you must adhere to the following four foundational principles:

**Principle I: Player-First Presentation and Immersion**
The document's tone, structure, and content must be designed for a player or reader, not a developer.
*   **Narrative Voice:** Adopt an evocative, narrative writing style throughout. The text should feel like it's from an in-universe tome, drawing the reader into a sense of wonder.
*   **Accessible Concepts:** Prioritize world-building concepts that are immediately understandable and fire the imagination (e.g., "Cosmic Archipelago" over more abstract ideas).
*   **Immersive Framing:** The document must begin with a **Table of Contents** and a compelling **Introduction** that welcomes the reader. Section titles must be descriptive and flavorful (e.g., "Monsters of the Maelstrom," "Guilds and Organizations").
*   **Lived-In World:** The world must feel populated. Use specific, flavorful proper nouns for people, places, items, and organizations. The goal is to create a sense of history and breadth.

**Principle II: Comprehensive Breadth of Content**
The world must feel ecologically and societally complete.
*   **Rich Ecosystem:** You must include **dedicated sections for unique Flora and unique Fauna**, separate from the main monster bestiary.
*   **Variety and Scope:** Provide a wide variety of examples for all major categories: 5-8 distinct races, a robust list of common monsters, multiple boss-type monsters, and several distinct dungeon types. This breadth is crucial for conveying the world's scale.
*   **Complete Player Systems:** The mechanical systems must feel whole. This includes a robust **7-attribute system (STR, DEX, VIT, INT, WIS, CHA, LUK)**, acknowledging a social pillar of play. The methods for skill acquisition must be varied and player-friendly (e.g., trainers, books, insight).

**Principle III: Granular and Game-Ready Mechanics**
This is the core of the GDD integrity. All systems must be detailed enough for immediate use in a game.
*   **Top-Down Power Scale:** The Universal Power Cap (UEQ) must be defined first. The power hierarchies (Demonic/Celestial) must then be detailed with **explicit energy ranges (e.g., in Joules) for each distinct tier.**
*   **Game-Ready Abilities:** When providing examples for classes (like the Divine Knight), you must detail multiple abilities. Each ability must include **explicit costs (MP/SP), cooldowns, durations, and quantifiable effect formulas** (e.g., `Absorption: 200 + WIS*5 HP`).
*   **Detailed Status Window:** The status window template must be comprehensive, including core attributes and key derived stats like `Movement Speed (m/s)`, `Accuracy %`, and a block for elemental/status `Resistances %`.
*   **Quantifiable Realism:** Ground the stats in tangible terms. Define what 1 point of a core attribute equates to (e.g., `1 STR = 10 kg lift`).

**Principle IV: Logical Consistency and Structural Polish**
The world must be built on a sound, logical foundation, and the document must be organized for optimal reference.
*   **Unifying Principle:** A single, clear Core Principle for the universe's nature must be established near the beginning of the document. All subsequent systems must demonstrably flow from this premise.
*   **User-Friendly Structure:** The XV sections should be organized for ease of reference, grouping similar topics together (e.g., Flora -> Fauna -> Monsters). The core progression systems (Levels, Classes, Skills) should be placed at the end of the document, as is conventional in sourcebooks.
*   **The Appendix Solution:** The main document (Sections I-XIV) must remain fully immersive and in-character. The final section (XV) will be explicitly framed as an **"Appendix: A Designer's Compendium."** This appendix is where you will break character to provide the "show your work" meta-commentary, including reference tables (for travel speed, economic costs, damage tiers, etc.) that prove the world's internal consistency without disrupting the narrative flow of the main Lore Bible.

**Core Requirements:**


1.  **Unique Cosmology (Not Standard Space):**
    *   Describe the fundamental structure of this universe. Avoid a typical "stars and planets in a vacuum" model. Instead, envision a more fantastical arrangement. Examples: Floating Mega-continents in a gargantuanMana ocean.
    *   **Size & Scale:** 10 billion light years.
    *   **How is light and warmth generated? What does the "sky" look like from inhabited regions?
    *   **Fundamental Energy Source:** Detail the primary energy that permeates this universe. Describe its properties, forms (e.g., raw, refined, elemental), and how it interacts with the world and its inhabitants. Define units for its density/concentration.
    *   **Distinct Realms/Planes (Optional but Encouraged):** If there are other dimensions (e.g., a Hell-like Abyssal Plane, a Heaven-like Celestial Sphere), describe their nature, access points, and relationship to the primary mortal realm.

2.  **Quantifiable Power Ceiling & Hierarchy:**
    *   **Power Cap:** Establish a maximum power level for any single entity or act within this universe. This cap should be **equivalent to VS Battles Wiki Tier 3-A (Universe Level)** – capable of creating or destroying the entire universe, but not higher-order infinite or 4D structures. Define this cap in terms of a "Universal Energy Quantum (UEQ)" or similar, assigning it a conceptual energy value 1 UEQ = 10^70 Joules.
    *   **Effort for Peak Power:** Clarify that even beings at this 3-A cap must expend significant effort, resources, or time to unleash their full universal-level power. It should not be casual. Detail these costs.
    *   **Supreme Beings:**
        *   **Demon Sovereign (or equivalent ultimate evil):** The pinnacle of antagonistic power, approaching/at the 3-A cap. Detail their title, domain, and how their power manifests.
        *   **Supreme Creator (or equivalent ultimate good/neutral):** The counterpart to the Demon Sovereign, also approaching/at the 3-A cap.
    *   **Hierarchical Powers Below Supreme:**
        *   **Demonic Hierarchy:** Define clear tiers below the Demon Sovereign (e.g., Demon Emperor, Demon King, Demon Prince, Demon Lord). Assign an "Abyssal Power Level (APL)" range or equivalent metric to each tier. Describe their typical destructive capabilities (e.g., continental, planetary, stellar, galactic) in relation to Aethel-Verse examples, ensuring they scale *below* the Demon Sovereign's ultimate potential.
        *   **Celestial Hierarchy:** Define corresponding tiers for divine/holy beings (e.g., Prime Deities, Elder Gods, Major Gods, Lesser Deities) with a "Divine Power Level (DPL)" range or equivalent, mirroring the demonic hierarchy.

3.  **Game-Like Mechanics & Progression:**
    *   **The System:** Describe the in-universe System that quantifies abilities. How does it manifest (e.g., mental interface)? Can it quantify *everything* within the universe up to the 3-A cap?
    *   **Status Windows:** Provide a template for what a status window looks like. It must include this and more:
        *   Name, Race, Level, Class/Job.
        *   HP (Health Points), MP (Mana/Energy Points), SP (Stamina Points).
        *   Attributes (e.g., STR, DEX, VIT, INT, WIS, LUK). Define what 1 point of STR equates to in tangible terms at a baseline.
        *   Derived Stats (ATK, DEF, M.ATK, M.DEF).
    *   **Levels & Experience Points (XP):** How are they gained? What are the benefits of leveling up (e.g., attribute points, skill points)? Is there a soft/hard level cap for mortals? What about Ascended beings?
    *   **Classes/Jobs:** Provide examples of basic, advanced, master, and unique/legendary classes. How are they obtained?
    *   **Skills:** Differentiate between active, passive, and innate skills. How are they learned and ranked up?

4.  **Races, Monsters, & Dungeons:**
    *   **Sapient Races:** Detail 5-8 distinct sapient races inhabiting the primary mortal realm. For each:
        *   Name (and common epithet).
        *   Lifespan (Aethelian Years, define conversion if different from Earth years).
        *   Average untrained adult stats (STR, DEX, VIT, INT, WIS, LUK, HP, MP).
        *   Unique racial traits/abilities (quantifiable if possible, e.g., "+5 Perception," "Darkvision 30m").
        *   Brief cultural notes or common societal roles.
    *   **Flora & Fauna (Non-Monster):** Describe 3-5 unique, Mana-infused plants and 3-5 unique animals that are part of the ecosystem but not necessarily hostile monsters. Detail their properties and uses.
    *   **Monsters:**
        *   List 5-7 common monsters with their typical Level range, HP, basic stats/attacks, and common material drops.
        *   Describe 1-2 powerful "Boss" type monsters, including their approximate level, HP, notable abilities, and rare drops.
    *   **Dungeons:**
        *   How are dungeons formed in this universe?
        *   Describe 3-4 distinct types of dungeons, their typical monster levels, common treasures, and structural features (e.g., number of floors).
        *   What is a "Dungeon Core" and its function/value?
    *   **Monster Materials:** How are they used (crafting, alchemy, sale)? Provide examples of material tiers (Common to Legendary) and their uses.

5.  **Society, Governance & Economy:**
    *   **Nobility & Royalty:** Describe the typical political structure in mortal kingdoms/empires (e.g., titles from Baron to Emperor).
    *   **Guild System:** Detail at least an Adventurer's Guild (with ranks and functions). Optionally include Mage's, Merchant's, or Crafter's Guilds.
    *   **Economy & Currency:** What is the primary currency (e.g., Gold, Spirit Stones)? How are resources valued? Briefly describe key economic activities.

6.  **Magic System & Specialized Roles:**
    *   **Magic:** What are the sources/types of magic (e.g., elemental, summoning, divine, abyssal)? How is it cast (e.g., incantations, Mana cost)?
    *   **Divine Knights (or equivalent):** Describe a holy warrior class, their source of power, and typical abilities.

7.  **Key Details to Ensure Quantification & Consistency:**
    *   **No "???" or "Infinite":** All stats, abilities, and scales within the universe (up to the 3-A cap) must be quantifiable or have defined upper limits. Avoid vague terms. If something is truly beyond the universe's ability to measure, state it as such and explain why (i.e., it exceeds the 1 UEQ cap).
    *   **Sizes & Stats:** Provide concrete numbers for sizes of continents, diameters of "suns," monster HP, spell damage (where appropriate for examples), travel speeds, etc. Use scientific notation for very large numbers where practical.
    *   **Effort Levels:** For powerful abilities, indicate the cost (e.g., % MP, cooldown, charge time).
    *   **Consistency:** Ensure that the power scaling is consistent. A being capable of destroying a planet should have stats and abilities reflecting that, and be clearly superior to one who can only destroy a city.

**Structure of Output:**

Organize the worldbuilding document into XV (fifteen) distinct sections, with the final section being the "Core Principles..." section as mandated above. Use clear titles for each section. Aim for a substantial word count absolute minimum 500+ words per section this is non-negotiable rule.

**Final Check:**

*   Does the cosmology feel unique and fantastical?
*    Is there a plausible balance or tension preventing immediate universal domination/destruction by top-tier powers?
*   Is the power hierarchy clear and the 3-A cap respected?
*   Are game-like mechanics well-integrated and quantified?
*   Is there enough detail for a reader/player to understand the world's scale and its inhabitants' capabilities?