Mag'har orcs are a race of brown, uncorrupted orcs from Draenor, now Outland. They inhabit plains and are slightly more peaceful then green orcs.
All orcs were once noble shamanistic people constructing mighty tribal societies that were based around survival. They would always work on their personal honor and ritualized combat. One day, Gul'dan, an orc that betrayed them and joined the Burning Legion. the orc clans fell deep into demonic enslavement and were led into Azeroth as an unholy vanguard of the Burning Legion meant to obliterate everything in their path. However some orcs remained uncorrupted and continued to follow their old ways. Now, many years later the young orc Thrall has recruited them with open arms into the New Horde were they teach other orcs of their past and culture.
At some point prior to the Blood Pact with Magtheridon, a ravaging orc disease spread across the Horde, the plague was called "red pox". Geyah built a quarantine village in Nagrand which is the Frostwolf clans' homeland. For reasons unclear, the orcs managed to avoid the corruption that plagued even their parents and the rest of the world. For unknown reasons, the orcs managed to escape the plague. The Nagrand orcs then came to be known as the "mag'har", which in Orcish language literally means "uncorrupted". Soon after they recovered and built the town of Garadar. The mag'har orcs have never been corrupted by either Magtheridon or Mannoroth, and thus have remained unaffected by the Blood Curse. Unlike their former clan members who live in the ruins of their once-mighty holds, the mag'har are made up of members of different orc clans who escaped corruption. The current leader of the mag'har is a wise, old orc woman named Geyah. Recently though she has been gravely ill. Grom Hellscream's son, Garrosh Hellscream was the military chief of Garadar and then became the warchief of the Horde. Jorin Deadeye, Kilrogg Deadeye's relative also is assisting Garrosh. Another mighty mag'har who helped in Garadar and recently died, Dranosh Suarfang was also present.
The mag'har architecture has been used before in the past. This suggests that during the First War, orcs used similar constructs to those back at home on Draenor. However, over time, their buildings become more warlike and nomadic. Those back on Draenor (now Outland) still use their old architecture.