We've been haunted down for several months, by a... creature whom we have no idea since when had resided on this planet or how.

This ancient one does not show any traits of possessing a definite form or shape. There are plenty of little 'spikes' on the surface that is keeping it away from our world, each of different shapes and components, suspecious of constituing a somehow ominous and noxious pattern under our inspection, yet we are unable to guess what ritual they may resemble.

As it may look somehow transparent, human vision could easily tell there are several 'organs' within which distinguish themselves from the remaining parts. Through some invisible 'veins' they are connected, only at this point human physiology could help us to some degree. Their chaotic movement may appear to be according to the heavenly rhymes that we as human beings are uncapable of perceiving.

Now shall my note end, wish us luck.

(Sorry I know this is bad, trying to describe something in a Lovecraftian way is too hard.)