Overlord (the series) Guild Base Supplement

From the introduction: The Guild Base. In Yggdrasil they were the homes and fortresses of those Players both lucky enough, savvy enough, and powerful enough to find a place that they could take over and convert into a base from which they could exert influence, store their treasures, and retreat from the dangers of the world(s) outside. User summary: This supplement is intended for use with Overlord (the series).