The home dimension for the hated Zombie Pigmen. The rumor is, they are controlled by their masters, the Blaze Overlords, although one has not been seen in generations. The Nether truly is a hell dimension, and the only way out is forming obsidian Nether Portals. At the end of the Second Age, the nether forces were trapped in the Nether when a small coordinated band of men went into the Nether, destroyed the obsidian portals and sacrificed themselves. With no water, and thus no way to create obsidian, the pigmen were trapped in the nether, until fools in Travill opened a nether portal, allowing them back into the Overworld. The pigmen farmed up some obsidian and returned to the Nether with the ability to open portals anywhere and start a fresh Nether Invasion.