The Blob
Somewhere far, far away, there is a secluded mountain covered in ice and snow and loneliness. It rests on top of a forgotten land, filled with isolation, frosty boulders and a vast amount of nothing. Not even wind is brave enough to visit there, let alone make any noise. It is like sound itself had decided it needed a vacation and then left to look for southern warmth.
There are no leaves to rustle, no grass to silently whisper, no little feet to patter and end their miserable short lives in the hold of bigger feet with claws attached. In short, the mountain is situated at the end of everything, if everything is considered to be a place and not a shady pronoun.
Inside that huge mountain is a cave so big it can fit the entire Westminster Abbey inside it, if Westminster Abbey ever decided to come and visit. It is, of course, not likely to do so, as it has become terribly claustrophobic in its old age. The cavern is empty except for a tiny red speck, smack in the middle of the sparkling, freezing space.
As the camera zooms in closer to the speck, we can see that it is not, in fact, a speck, but a pulsating sack of red liquid (and how is it staying in liquid form in this sub-zero temperature, is anyone's guess. And where is all that light coming from? Electricity hasn't made it's way to this secluded place yet! Then what about the camera... MOVING ON!). Aside from the fact that there is a dark metal sign next to the pulsating sack of red liquid stating that it is an "Ominous Pulsating Sack Of Red Liquid", we can sense that there is something ominous about it. You just can't put your finger on it, and wouldn't want to, since it looks really gross anyway.
The sack has sat there (or lounged or lied or whatever it is that ominous sacks do) doing nothing for thousands of years. Well, two to be exact. It has stayed the same since it arrived at this barren place in a terrible inferno of fiery light and thunder. The place might not have been so barren or mountainous prior to this incident, but it surely was after it. And it had some deep traumas concerning that particular event.
If you were so inclined and attached an electron microscope to the sack, you might notice a minute change in the density of said sack, a pattern following the cycle of the year. But since no-one has ever ventured that far into the wilderness, we, unfortunately, stay none the wiser (although the wiser refuses to comment on anything people are trying to drag it into).
The sack is busy pulsating and losing density year in year out except for one day of the year when the excitingly repetitive pulsing stops and it starts to vibrate instead. This blob, (Yes, we can call it a blob since it has no brain whatsoever, and therefore cannot be offended by it. It does have a very developed nervous system though, so in that sense, it is as intelligent as most humans on our dear planet Earth.) so... this blob is developed enough to recognize when it has become sufficiently devoid of sustenance to start a new feeding cycle. Then, for one day of the year, it opens like a flower, and yes to answer to your question, not very much unlike a Demogorgon, ready to absorb all the nourishment it needs for another one-year -cycle.
It uses a mechanism called a subatomic absorption to (yes, you guessed it) absorb the nutrients from its prey. It doesn't have to move, lazy bastard that it is, but the particles move towards it through air like little piglets rushing home to eat on a cold winters day. Only the very youngest specimens of its prey are acceptable to feed from, since little by little, year by year, it drains and drains them until when the prey hits adulthood, there's nothing left.
The prey is blissfully unaware of this, except that somewhere in the collective consciousness of the vast mass that is humankind, they know something is wrong, and the adults try to frantically compensate the gradual loss of the innocence of their children with gifts, holiday decorations and made up stories of miracle babies and old men bearing gifts. In the end of the long day the blob closes its hungry petals, lets out a final contented burp, and being very pleased with itself, starts to pulsate again until the next feeding cycle begins in a one years time.
Happy Holidays and Merry Christmas and Cheerful Days Off Work and all that!