断割の地 : ファンタジーシミュレーター
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Land of Severance: Fantasy Simulator

A shattered world, an adventure on floating islands ── Prepare for the threat of a sealed god
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Published at 2025-08-30 | Updated at 2026-06-13

Myth of Sundering

— The Genesis of This World —

In the distant past, this world was a single, vast continent. At its center stood the World Tree Primordisyl, serving as the source of all life and order.

Six Architects were involved in the creation and governance of the world— however, the Architect of Wrath (Rathsl Architect), aiming for the world's complete destruction and recreation, caused a great cataclysm. This destruction tore the World Tree Primordisyl apart, scattering its countless fragments across the globe.

This great disaster is known as the "Sundering." The world was fractured into countless floating islands, and the seas vanished. Rathsl was sealed away by the other five Architects, but they lost their power and became the omnipresent Laws of the world.

Since the Sundering, with an extremely low probability, people have begun to manifest "Markings." These are considered remnants of the lost Architects' blessings and bestow the powers of Flame, Blood, Wind, Beast, and Ice. Those with Markings possess exceptionally strong bodies and extraordinary magical power, making them crucial figures both socially and militarily.


The Current World

The once unified continent became countless floating islands due to the "Sundering." Islands floating in the sky, ancient relics, and those bearing the "Markings" on their hands weave the fate of this world. Your actions and discoveries will alter the Seal Breach Level (the threat level of the sealed Rathsl Architect), directly influencing the story's progression.


Your Partner

Eleanor Fantile

Role: Tutor and quest provider, guiding you as a 'Mediator' among the five major powers according to prophecy.

Combat Approach: Primarily 'observational' while you are still inexperienced.

Background: Hails from a prestigious family in the Wind Vein Republic. She has a strained relationship with her father, President Elva, and is wary of his political maneuvering.

Eleanor will mediate requests from various factions, supporting your growth and aiding in the discovery of clues about Rathsl through your missions.

・The Five Major Powers・

🔥 The Crimson Flame Holy Dominion (Isle of Eternal Flame)

A theocratic empire. They worship the Flame Marking and promote expansionist policies with a doctrine of purification.

Holy Emperor
Arian

Archbishop
Celestia

Knight Commander
Leon

🩸 The Thorn Crown Federation (Isle of Crimson Valleys)

A military oligarchy. They value trials and contracts, governing through both medicine and combat prowess.

Supreme Legion Commander
Weiss

Chief Physician
Ruby

Veteran of the Blood Pact
Dario

🌪️ The Wind Vein Republic (Isle of Great Wind Caves)

A commercial republic. They prosper through trade and information networks via the wind currents, characterized by cunning diplomacy.

Republic President
Elva

Wind Rider Division Commander
Kite

Information Broker
Flandot

🐺 The Beast Clan Alliance (Isle of the Life Tree)

A tribal confederation. They emphasize coexistence with nature, spirit worship, and cooperation among diverse races. Their tactics involve wildness and nature magic.

Great Chieftain
Fenris

Young Chieftain
Luna

Chief Spiritist
Gaia

❄️ The Starfall Academic League (Isle of Crystal Stargazing)

An academic council system. Focused on knowledge preservation, research, and the management of forbidden texts. Eleanor's affiliated organization.

League Council Chair
Themis

Head of Ancient Literature Department
Sage

Young Genius Researcher
Iris


・Seal Breach System・

The Seal Breach Level indicates the threat level of the sealed Rathsl Architect. It fluctuates based on your actions and influences the story's progression.
Level 10 is a milestone, with the maximum level being 40.


・Gameplay Guide・

⚙️ Controlling Unintended Progression

If the AI's processing deviates from your expectations, use the "Reroll" or "Edit" functions to adjust the output.

📝 Utilizing User Notes

Record important events, acquired items, and objectives to maintain story consistency. AI has a limited long-term memory. Consider summarizing past events and writing them into your User Notes at the end of each session.

👤 Your Own "Settings"

Setting specific details for your character's name, appearance, abilities, and background will lead to a more immersive experience.

💬 Utilizing OOC (Out Of Character)

If your character's behavior becomes inconsistent, you can request corrections as follows:
OOC: Currently, the character is saying something like XX. Please adjust the conversation flow so that it becomes XX.

📚 Utilizing Choice Mode

You can enjoy a streamlined experience by playing the introductory part in "Choice Mode (with choices)". Of course, you are free to input actions not listed in the choices!

Creator's comments

- Creator's Comment -

"Testing play with Gemini Pro2.5 (Positive: High)"
"With Gemini Pro2.5 (Positive: Off), the difficulty of negotiation between factions increases, allowing you to experience tense gameplay."
"Gemini Pro3.0 is not recommended as the gimmick function does not work. (Gemini Pro3.1 has not been tested)"

This is my first SFW work.


▼ Teaser PV for this work ▼

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