Gatekeepers

The Gatekeepers are a druidic sect dedicated to protecting the natural world from unnatural forces. They battle aberrations and guard against extraplanar invasions and the release of ancient evils.
The Gatekeepers maintain the oldest druidic tradition on Khorvaire. Over fifteen thousand years ago, the green dragon Vvaraak came to the Shadow Marches and gathered a following from among the orcs of the region. In her studies of the Prophecy, Vvaraak had foreseen a great threat that could be stopped only by the younger races. So she taught the orcs the secret language of the natural world and showed them how to work with stone and soil, and how to read the future in the movement of the Ring of Siberys. She charged her students to remain ever vigilant against the threat that was to come and to protect nature from those that would corrupt it.
Thousands of years later, the daelkyr opened gates from the plane of Xoriat and unleashed hordes of mind flayers, beholders, and other foul creatures into the world. The conflict that followed destroyed the goblin empire of Dhakaan and the daelkyr's invasion left scars across Khorvaire. Ultimately, Vvaraak's students sealed the gates and imprisoned the daelkyr in the Dragon Below. Even after this triumph, the orcs couldn't be sure if they had turned back the threat Vvaraak had foreseen, or if a greater danger lay ahead. So, in addition to guarding the seals that bind the daelkyr and keep Xoriat at bay, the Gatekeepers remained vigilant against the possibility of worse to come.
In the millennia since that struggle ended, the Gatekeepers have shared Vvaraak's wisdom and druidic magic with humans, shifters, and others who came to Khorvaire. New interpretations of Vvaraak's teachings gave birth to new druid sects: the Wardens of the Wood, the Greensingers, and the Ashbound. Today, the Gatekeepers are one of the smaller sects, and many of the sites of their long-ago battles have been abandoned and forgotten. But some Gatekeepers still remain in the Shadow Marches and the Eldeen Reaches, continuing their vigil to this day.