A poisonous enemy that's hostile to earth.
From a place very far away, with a mysterious birth.
They are the infiltration unit of an alien scourge,
That works to get into society and start a purge
Of humans in major cities, going one by one.
From the tenements in Brazil, to the land of the rising sun.
They look like humans, but they are not.
Just ask the soldiers that they have fought.
They are less person, more reptilian in nature.
A twisted form of species beyond any nomenclature.
They have been seen by Xcom and several of their men.
Who are these aliens so creepy and thin?