The Blackwoods is a zone with gigantic procedural trees, some of these can be up to 500 cubes height. That's a hilly dark zone with ground of Alien Rock. This is a very dangerous area. The zone is populated with Friend Voxel. This could be tricky to pass trough this zone where weird things happends, so you'll have to get smart and find a good strategy.
The ground is made of Alien Rock, the trees are made of Alien Wood and Silver Leaves.