Dark Abyss

The dark abyss could be a new minecraft biome, this new biome would spawn later at coordinates (15000 'X' 15000). This biome would be like the little floating islands at the end, but those islands would have depth, from below, like the obsidian pillars but downwards. The atmosphere would be like when you create a wither, very dark, there would be no trees, the pillars would only be black grass and stone