These creatures originated from a planet with no light and gravity greater than Earth's in a distant galaxy. They possess echolocation instead of sight, have impenetrably tough armor, so tough that it can withstand all conventional human weaponry, from small arms to missiles. They are completely blind, their dense armor and musculature so heavy that they cannot swim in water. They are agile and taller than a human, their weaknesses are high frequency sounds. They have no smell.