NEXUS was founded by CO0KlE_M0NSTER and Mr_Boost in mid-Novemember of 2023, it consists of a maze-like hallways made out of mud, green terracota, sandstone and froglights. There is a mapart hall, a huge storage room, potion makers, wool farm, animal pens like goats cows etc, chess play area and bedrooms. It was the capital base of Nexus Syndicate, a clan/group mainly headed by Cookie to collect resources, basehunt, collect artifacts etc. It flourished for a few months, with Niseau joining and expanding the base massively underground.
However it was leaked due to drama caused by CookieMonster, you can read more about it in Nexus Syndicate - Pictures included.