In the cycle before our own, the civilization of the First Gods was eradicated by a cataclysmic force that was beyond their control. On the brink of utter destruction, the few survivors harnessed the ten aspects of creation to end their cycle and shape the development of a new universe. In the process, however, many errors were introduced into the fabric of the new worlds, which would eventually resurface when the Guardians of the new universe began to unveil the secrets of their creation.
(Expert level, part 1 - 23 scenarios.)
Wesnoth 1.14.0 or later required.
Discussion thread in the Wesnoth.org forums: http://forums.wesnoth.org/viewtopic.php?f=8&t=43023