What are the chances of success?

Each monster subspecies could have its characteristics, whether it was wings, powerful jaws, or claws of a certain length, some detail that each member of a particular species possessed.

Anomalous Monsters were on a slightly different level because they could be various in appearance, but they all had the power of anomalies, they were a separate category.

Crimson Sacrificers also belonged to a specific category - regenerative monsters. The power of these monsters was clear and simple, they were hard to kill and defeat because they could heal almost any wound, as long as they had enough energy to do so.

Thus, Adam's one hit was not enough for Crimson Sacrificer to kill the monster, even though Crimson Sacrificer's head was blown away as if from an explosion.