The Obsidian Forest is a petrified forest located in the southern coast of the Twilight Highlands. This area was once a Red dragonflight stronghold that was corrupted by the Black dragonflight. In its center stands a large partially petrified tree that was once a beacon of great life. Velastrasza tasked an adventurer to place in the hollowed heart of the tree so that in time, the ravaged land would be restored.
- The Obsidian Lair can be found in the mountains to the west of the forest.
- It was probably similar to the Vermillion Redoubt before its destruction.