The phrase relates to the desire to acquire a digital version of a compendium detailing creatures, often for role-playing games, without incurring any cost. Such a compendium, if it exists, would provide descriptions, statistics, and lore concerning various monsters, intended for use in game mastering or player information. The expression indicates the search for a complimentary, electronic copy of this resource.
The perceived value of such a downloadable compendium stems from its utility in game preparation and play. Having access to a comprehensive list of creatures allows for diverse and engaging encounters. Furthermore, the “free” aspect represents a potential cost saving, making it accessible to a wider audience. Historically, physical bestiaries were the standard; the digital format offers convenience and portability, but is usually purchased.