Owners of the Seas is the fourth supplement to Reign, all of which were released using the ransom method. The PDF files cover the culture, politics, and campaign hooks of the Obotilobitanolonikututano (Ob-lobs); their philosophy and values (given importance by the number of syllables); their strange alphabet; their combat secrets (the "hell's hooks" weapon and fighting techniques and the staggering Roloneepo methods); aqueous divination (including 10 spells); and of course one-roll Ob-lobs.