Nether

The Nether is a parallel dimension that is linked to the Overworld by Nether portals. It is filled with rugged terrain, fire, seas, and columns of lava, Netherrack, unique ores, and unique hostile mobs.

History
The Nether was once a mysterious dimension known as an unmarked territory. Travelers wondered about it for very long amounts of time, making the Nether a quite common topic in literature and other things of that sort. Centuries later, the Nether was finally given its mark when Tredecim, a valued wizard opened a portal.

Not long after he and his eleven other faithful wizards entered, they realized that the Nether is a very hellish place full of nether rock, Zombie Pigmen, Ghasts, and other very bad creatures. The foolish wizards accidentally caused a rip in space and time, causing the creatures to roam across the overworld. It wasn't until years later that they were all sealed up in their box.

Nowadays, the cowardly will turn back, brave will enter the portal, and the fearless will fight back.