Tyranids. There is so much and so little to them. They are the pinnacle of evolution, the direct representation of the expansion of life. On the other hand, there is no individual. Tyranids are all part of a single organism, lead by the absurdly powerful and intelligent Hive Mind. You cannot reason with them. You cannot understand them. You can only feed them.
Tyranids are unstoppable. When they travel to a system, they are preceded by feelings of primal dread, as well as natural disaster. Their psychic presence blocks out all communications while the planet is literally consumed, down to the rock. Flora, fauna, water, oxygen, even the soil and geothermal energy of the planet are all consumed, leaving nothing but a cold, floating rock.
The tyranids that have already visited the Milky Way left an unmistakeable mark. And yet, those were just the first. Tyranids are Galaxy eaters. They have eaten other galaxies, and are now approaching ours. They come in hordes, literally
clogging your weapons with their own corpses. And that's just the grunts. The shock troops are living tanks, armed with many varieties of organic weaponry. The greatest of them is the Swarmlord, a creature that has existed for as long as the tyranids themselves. When it is killed, it is simply re-made, with all of it's old experiences and memories intact. A direct extension of the Hive Tyrant's will, it is a supreme commander, further organizing the already deadly tyranids to ridiculous levels.
Fear them, for they are the eaters of worlds, and they are coming.
