Worldbuilder’s Library

Our research. Your world.

Worldbuilding is fun. But unless you want to spend a decade rewriting your setting, it best to use well-researched materials from day one.

Worldbuilder’s Library is a collection of articles, books, zines, and decks written and illustrated specifically to help fellow worldbuilders create their universes.

Created by the team of writers, worldbuilders, and designers at Double Proficiency, the Library aims to cover all ground between the natural world, magic, folklore, technology, warfare, and best adventuring practices. Whether you’re in need of magical plants, engaging encounters, or are just fighting a writer’s block, the Library has something for you.

Let yourself get inspired.

Pick a Topic


Plants, animals, and landmasses


Art, language, and society


Legends, spells, magic items, and occult lore


Tools and tips for creating games of your own


Building audience and promotion


Books to read, games to play

Aurorae RPG

Monthly Summary: February

February started with COVID and ended with a war. But we got some TTRPG work done in between, against everything.

Aurorae: Ård Nväldi

Necromancers and soldiers, the Nväldi live in their crystal spires, remembering their long-gone empire. Their fearless mistlords turn to piracy…

Aurorae: Temel Kho-tu’ud

Nomadic people living below the Aurorae Domains, down the gravity well. Traders, shepherds, and philosophers who rely on herds of…

Aurorae: The Vila

Monster design challenge: an utterly alien, incomprehensible – yet fully sentient – species competing with humans in Aurorae RPG.

Aurorae: The Triveni

Traders, mages, and mercenaries. Living in the Mycelium, Triveni embrace their fungal overlord with their food, custom, and architecture.

Aurorae: The Khradi

By Jakub Wisz It’s been a while since the previous Aurorae development blog – and so here we are. I…

Latest Worldbuilding Posts

Ghostly Apparitions

A 50-card deck of ghosts, specters, and spirits ready to be summoned into your TTRPG of choice. Give the players the spookiness they deserve!

Wondrous Stores

A 50-card deck of wondrous stores, shops, and other commercial establishments ready to use in your tabletop RPG of choice – now available for purchase!


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