A particularly deadly variant of the Mosscloak Behemoth, the Tyrannus terrorized the Enclave for some time, able to catch unawares many who ventured outside the Enclave. The creature exhibited superior intelligence to its counterparts, observed by how it would target isolated prey, while carefully avoiding the many traps and snares laid by the camp's trappers.
Trappers did all they could to conceal their scent and tracks, but nothing seemed to work. Some speculate the Tyrannus was highly sensitive to the Anomaly, and could identify subtle disturbances caused by the presence of humans. Eliminating the creature with Juno's blessing has earned you some gratitude with the Deserters.