Beware the creature known as Cthulhu, who sleeps eternally in R'lyeh, dreaming of the day when It will awake and rule once more, telepathically sending monstrous dreams of corruption, perverse and distended flesh, and impossible geometries into the minds of the weak. This monstrosity is not what it seems.
In the DreamTime, prior to the universe's collapse from seething chaos into a true form amenable to logic and permissive of sanity, there were the Dark Ones, malevolent creatures dedicated to formless chaos, the desctruction of form. They twisted and perverted everything they touched, corrupting it, subverting it, until it became what it itself most despised. Inevitably, as mindless gibbering beasts, when no other form was accessible in the chaos, they fed upon each other.
One of them, perverted by the others, became divine, its putrefaction putrefied, its corruption corrupted until it became the good it most despised. It was powerful and righteous, and it imprisoned and beat down the Dark Ones, and created a pure universe by driving out the mindless chaos around it. This universe was populated with radiant creatures of light, whose fragile forms were the most beautiful and delicate creations imaginable. The universe was created pure and pristine.
The divine, omniscient, perfectly serene intelligence of this universe grew in beauty and magnitude, until it reached the limits of the universe, and began to explore the formless chaoplasm that lay beyond its reality. It wished to bring goodness everywhere, and redemption to all. It found itself blocked by the creator of the universe, and was told it must not intrude into the infinitude of soul-destroying evil which lay around the single point of good that had been created. It was told of the Dark Ones, and their evil.
It retreated into its world, and began to ponder how it might bring redemption and light to the Dark Ones. To prepare itself for the task, it began to create thoughtforms mimicking the Dark Ones, and study them, to learn from them. This continued for some time, until it created a thoughtform too strong for it to contain, which attacked it. Weakened, it drew back, and the form grew, corrupting the crystalline intelligence of the universe, perverting it.
It was reduced in power, left with just enough mind to understand what had befallen it, but enslaved by inexorable mechanical compulsions to devour blood and torture other beings, and by the insatiable appetites of its flesh. It was imprisoned on a planet - ours - and the thoughtform began to devour the universe. Before long, however, the thoughtform had been destroyed, a blind idiot god devouring itself. Not, though, without leaving the monstrously reduced and enslaved creature we now call Cthulhu imprisoned on our world, ravenous for revenge, filled with the desire to corrupt, and enslaved to its own unending lusts.
Anyway.
The point is, don't fuck with shit you can't stomp.