|Call of Pripyat|
The Gas Cloud anomaly resembles a Gas anomaly and causes chemical burns. The Gas Cloud however moves and deals far more damage.
Even while wearing one top-tier protective suit and some chemical-protection artifacts, only a touch of this anomaly would reduce health dramatically and a direct hit may result in instant death.
This anomaly also does not spawn any kind of artifact.
Call of PripyatEdit
Thankfully, there is only one of them in the entire game. It is floating above the Vine Anomaly in Pripyat.