Stage 1 hosts are brutes and undeniably powerful. Many Enforcer commanders refer to these creatures as Plague Lords, reflective of their obvious command and control of the monstrous Plague armies rampaging ahead of them. Humans are of course not the only race susceptible to infection, but Teratons are a particularly threatening vector. How exactly the infection affects their brain chemistry is unclear – ETCU scientists barely understand the changes wrought on human victims.