You're exceptionally adapted to the post-Unveiling world. You gain the following benefits:
- Increase your Constitution score by 1, to a maximum of 20.
- You have immunity to poison damage and the poisoned condition from environmental sources (ash storms, toxic air, etc.). You still suffer from ingested poisons.
- You can hold your breath indefinitely.
- You ignore difficult terrain caused by ash, rubble, or environmental decay.