Anyone who's watched Ancient Aliens knows that some ancient cultures had materials or ways of doing things that we don't have anymore. Though they'll try and tell you that it was aliens that did it. But really, sometimes information is just lost. Well, that can happen in your fantasy RPG games, too. Skirmisher Publishing brings these fantasic materials to your games in their Materials of Ancient Empires book. You can get your copy now.
From the website:
The idea of long-lost cultures that were technologically or magically superior to those of the current era of a game setting is fairly common in both fantasy and science fiction. This mini-sourcebook contains entries for two dozen sorts of materials that were developed by ancient societies but which can no longer be created without the assistance of powerful magic or technology. They are suitable for use in any fantasy, modern, science-fiction, or post-apocalyptic games that use the d20 system and can easily be adapted for other games altogether.