Parasite Unit (Skulls)

If there are ten or more creature cards total in all graveyards, this spell costs {6} less to cast.

Fear (This creature can't be blocked except by artifact creatures and/or black creatures.)

{t} Destroy target creature. It can't be regenerated.

They received their powers from a species of parasite discovered by Code Talker. It destroyed most of their cognitive functions, leaving them to effectively become zombies both physically and mentally.