How to roll up 703 decillion different worlds: A megafauna world-generator for Herdspace

Something I cooked up a while ago: A Megafauna world-generator for Herdspace.^(*) This is by no means finished, but it has been sitting untouched for almost a year now, so I guess I can put out out in the world and ask for your feedback...

^(* You can use Megafaunae outside Herdspace as well if you want some change from boring worlds in a crystal sphere: Instead of your run-of-the-mill spherical earth type world, why not have a giant worldbeast several thousand km large, with its own gravity and athmosphere?)

download the free pdf (almost 70 pages) here

Cover of the ebook 'Worldbeasts: Explorers' Guide to the Walking Worlds of Herdspace'

Here's what the backcover says:

Walking Realms!

Ecosystems in (slow) motion

A Generator and Lorebook for Colossal Creatures in Spelljammer‘s most unique sphere

Herdspace is no ordinary crystal sphere. Only here, towering megafauna roam its vast inner shell, their bodies hosting entire civilizations, ecosystems, and mysteries older than the stars. These are the Worldbeasts: living landscapes, sacred titans, and arcane anomalies that reshape the very fabric of space, time, and culture.

Worldbeasts of Herdspace gives you the tools to bring these awe-inspiring entities to life. Inside, you’ll find:

• Deep lore grounded in Spelljammer canon, including Herdspace’s teleportation gates, sun cycles, and psionically active zones
• Cultural, ecological, magical, and mythic features for building truly unique creatures
• Adventure hooks, footprint aftermaths, spelljammer landing effects, and more
• A modular generator with 9 detailed chapters and over 40 rollable d20 tables.

You could come up with 703,687,441,776,640,000,000,000,000,000,000,000,000,000,000,000 different combinations. Will your dice last long enough for

permutations?

Whether you're a DM seeking a world-sized dungeon or a player chasing prophecy across the back of a sleeping god, this book is your guide to building legends that move.