3.3.5 World of Warcraft based on Azerothcore with custom content that spans progression . We do our best to maintain the originality of the game but have added in a number of custom features and configurations for a great game experience. Our goal is to maintain the vibrancy and nostalgia of the original game while adding elements of exploration and additional content.
This includes restoring old, lost, and unimplemented content, as well as implementing features you may have enjoyed in Cataclysm, MoP, or especially Legion. We often tweak these features to make them more creative, balanced, and personalized (or simply to work with a 3.3.5 client).
Marble-WoW contains a wealth of configurations and modularity, many of which are custom.
Please also note that custom encounters are more challenging than normal encounters.