The Ominous Woods biome is a dark, heavily wooded biome with pools of Liquid Poison. It contains Thorns and Deathbloom which can cause Withering effect and damage upon touching them. Dead and Dying Trees, and Umbran Trees that produce a purplish wood (appropriately named Umbran Wood, or Umbran Saplings). Umbran Trees come in two types: 2x2 Pine and Swampland-like Trees with Tree Moss.
This is one of the most difficult biomes to survive in for beginners, but if you're okay with everything trying to kill you, it's quite a nice place to live. Dead Tree Leaves also appear scattered quite a way a way from each other. This biome uses Loamy Grass and Loamy Dirt. Do note that the farther you go into these woods, the more fog there is and the harder it is to see.
Prior to the 1.8 version of BoP, Dark wood was used instead of Umbran Wood, which has a slightly different texture. Cave spiders, hostile wolves, and endermen were the only mobs that spawn in this biome.
Thick Ominous WoodsEdit
Thick Ominous Woods was sub-biome to this biome. It contained Thick Dark Trees which were much taller, that are more common there than in the Normal Ominous woods. In more recent updates for BOP before 1.8, a thick fog was added.