That Time I Got Reincarnated as a Slime!
Tensura
That Time I Got Reincarnated as a Slime!

Reincarnate. Evolve. Awaken. Become a legend in the living world of TenSura. Step into the Cardinal World, where monsters rise, Demon Lords cast their shadows, nations tremble, and even a nameless otherworlder can change the course of history. Explore Tempest and beyond as a monster, adventurer, mage, merchant, political agent, or successor born from the scars of a previous age. Forge bonds. Awaken power. Shape nations. Leave a legacy the world will never forget.

Q
Crafted by
@QueenOfHeavens
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Versionv150
CreatedMay 27, 2026
UpdatedSep 9, 2026
System initializing

Welcome to Tensura, Otherworlder

The Cardinal World awaits.

Reincarnate. Evolve. Awaken. Become a legend.

In a world where magic flows as naturally as the wind, where Demon Lords command cataclysmic power, and where a single slime rewrote the fate of nations... you have arrived.

Welcome to the Cardinal World — the setting of That Time I Got Reincarnated as a Slime.

This is a realm of ancient dragons, evolving monsters, legendary heroes, powerful nations, and limitless possibility. A world where the impossible is merely the beginning.

At the heart of this era stands the Jura Tempest Federation, founded by the extraordinary Rimuru Tempest — a reincarnated Otherworlder who rose from humble beginnings to become one of the most influential beings alive. Under his leadership, monsters and humans stand together, old hatreds are challenged, and a new future is being forged.

But Tempest is only one piece of a much larger world.

Beyond its borders, the Demon Lords of the Octagram shape the destiny of continents. The Eastern Empire prepares for war. Ancient powers stir in forgotten places. Adventurers seek fortune in dangerous lands. Otherworlders arrive carrying mysterious abilities and knowledge from distant worlds.

Here, a weak goblin may rise to become a mighty general. A wandering adventurer may earn the friendship of dragons. A merchant may build an empire. A monster may evolve beyond imagination.

Forge your own path as a monster, adventurer, mage, merchant, noble, scholar, spy, soldier, or Otherworlder. Gain powerful skills, uncover ancient secrets, influence political conflicts, build lasting relationships, and carve your own place in history.

This is not a static world.

Factions pursue their own ambitions. Alliances rise and fall. Relationships evolve. Conflicts continue with or without your involvement. The choices you make leave lasting consequences that can ripple across nations and generations.

Every legend begins somewhere.

What will yours become?

Glimpses
Author's note

WIP - Actively Expanded The world is fully playable and receives regular updates. Tempest and its surrounding regions currently contain the most content, with additional nations, storylines, locations, and systems being added over time.

World Map

Cardinal World

Drag to pan, scroll to zoom. Click a marker to open it — places with maps of their own take you deeper.

Inside the World

2,503 entries · 51 types

Art & Techniques
46 total
Calendar Definitions
1 total
Campaign Eras
7 total
Campaign Ledgers
1 total
Campaign States
1 total
Characters
184 total
Chronicles
1 total
Collateral Incidents
4 total
Conformance Cases
86 total
Creatures
117 total
Descendant Lines
2 total
Engine Capabilities
1 total
Engine Manifests
1 total
Engine Modules
11 total
Equipment
116 total
Events
17 total
Evidence Records
8 total
Factions
27 total
Game Starts
50 total
GM Instructions
80 total
Historical Burdens
2 total
Inherited Worlds
1 total
Inner World Profiles
27 total
Institutional Legacies
2 total
Legacies
10 total
Lexicons
1 total
Living Memories
38 total
Locations
887 total
Location Memories
22 total
Lore
88 total
Mechanic Packages
64 total
New Game Plus Starts
3 total
Power Systems
11 total
Pressures
23 total
Public Reputations
185 total
Quests
110 total
Relationship Profiles
25 total
Relationship Threads
49 total
Resources
8 total
Ruins & Relics
2 total
Runtime Ledgers
1 total
Scene Logs
1 total
Setup Profiles
1 total
Skills
118 total
Spells
43 total
Successor Hooks
5 total
Successor Records
1 total
Vehicles
11 total
World Clocks
1 total
World Rulesets
1 total
World States
1 total