The entire Moon Masters system has been redesigned to better mesh with the world of Rein on both a thematic and mechanical level. 

All of the Moon Masters card graphics have been updated to this newest version, while an extensive amount of Moonborne history has been rewritten to accommodate for the changes. The game is now referred to as Sea Sovereigns, to better reflect its current iteration.

This update also comes with significant additions to Moonborne history in general, various alterations to the rulebook, an expanded gender system plus a new status effect which is applied to Moonborne who contradict the Watcher's Words.