History 1: Sancre Tor' - The Great Walled City

Once a thriving economy with top notch redstone farms, including the greatest gold farm in the history of Mercia, was laid to waste in the Obsidian crisis. It's walls are triple thick cobblestone with a lava center to make it extremely difficult to enter. Its piston doors were the only access, allowing the guard inside to deactivate the lava flow and allow travelers inside. The gate was purposefully designed to take an extended period of time to open, but instantly to close, to ensure no undesirables were allowed inside. This would be their downfall, as the influx of new thinkers would soon make Mercia city the number one innovator in farming technology.

Through their greed alone, they produced the single greatest amount of gold in the world. They became obsessed with it and its power, so much so, that 95% of the gold in block form today originated there. Their portals through the otherworld began to let in Zombie pigman, and other unwanted in such a great number they began to over run Sancre Tor' and soon made it impossible to walk any amount of distance. This is where the once powerful city fell. Without the use of mods or other creative ability, they couldn't overcome the thousands of pigman, especially with the exaggerated lag they caused. Many former residents moved to what's now Karajama and Port Sarim and despised their old ways. They decided to never again make their money by making gold. They reverted to primitive farming techniques and soon the great nation would fade away into only memory.