Monster or human?

The Anomaly Monitoring and Countermeasures Force (AMCF) is a force created in each country to protect the population from anomalies. Essentially, it's an army that now defends states not from each other, but from anomalies. They possess advanced weaponry. The Geneva Conventions do not apply to anomalies, so any weaponry can be used as long as it doesn't cause harm to civilians.

The world is identical to the real one with one exception: states do not wage armed conflicts. Anomalies have focused all attention on themselves, and states lack the resources to wage war.

There are 3 main types of anomalies: territorial, biological and primary.

Territorial ones are mostly mindless. They exert their influence over a specific area.

Biological – people or animals that have begun atypical development. In the early stages, this typically manifests as itching in random parts of the body. Then, a glow appears – a harbinger of transformation. The third stage is transformation. It is most often associated with loss of reason in humans. In animals, it is sometimes neutral – for example, a dog may remain loyal to its owner after the transformation.

Primary anomalies are sentient anomalies. They combine features of both territorial and biological anomalies—their nature could be described as spirits or gods, depending on their strength. They have no biological basis, but possess consciousness and will. The vast majority are hostile to humans, but their motives have not been determined.

All Anomalies (of all three types) have a core—the primary source and generator of power. An Anomaly can only be killed by destroying the core.

Anomalies range in strength from SSS to F. An F-rank anomaly can be handled by a group of ordinary people. An SSS-rank anomaly poses a threat to an entire continent.