Question: Im writing a fiction and i need some help. I need to create an eldritch abomination that would represent humanity as a collective. Think of it this way. Humanity is collectively killed and merged into a singular massive cosmic abomination ala evangelion instrumentality style just without giant naked girls and severely traumatized teenagers. Humanity at this stage is a techno-organic species, one of the apex in the galaxy's history. Now the firm ive made so far has to do with humanity in some way.
The body: its humanoid in proportions due to it being a union of humanity. It has no skin, just transparent liquid diamond muscle with iron red striations, its cardiovascular system uses superheated liquid iron as blood. The bones are composed of a calcium silicate crystal that is shinny and white. Then it is covered in an obsidian bone plates that hide certain parts of the thing.
At its center lies a red ruby core that pulses energy throughout the body.
It has a large number of angelic wings composed of red solar plasma with blue tips on them. Very much like Magnus the Red's wings just made of solar flames.
It has three burning eyes.
It also has throught the body circuit like patterns due to humanity's techno organic nature.
The colors. Red is a psychologically active color on humanity as such its the most abundant on us, likewise blue is our general fabourite as it is present in the tips of the wings.
The firey and luminat nature of its wings come from the favt that humans are creatures of the light and being in absence of it for long perooss of time fucks with our minds. The wings symbolize humanity's long wish for flight.
Its name when translated means the Crimson Daemon Star of a Thousand Wings.
Thats it thats what i have so far. Can anyone make it more... eldritch?

Answer: 
**Have it be made of people**. Like those images made of smaller images, from a distance it looks like what you are describing but get closer and its made of people. 

When it talks every person in it talks with one voice, when it looks all of their eyes look in that direction. And when it stands still all of the people in it struggle like they are trying to escape or attempt to scream but nothing comes out. Since it is the union of humanity make that literal and painful looking.
You've spent all your time on trivia.

OK, so it looks - well, it's pretty impressive, but it's not eldritch - "weird; sinister or ghostly".

For eldritch, you're better off sticking with the traditional: icky, maybe snakelike or octopoid or insectile. And whatever you do, get rid of the bright colors. No self-respecting eldritch creature is pretty.

Look - if you want eldritch, you want to scare the carp out of people, and not (primarily) by looking powerful. Think *sinister*. Think vicious. Think alien and uncaring.

And all that stuff about what it's made of? Superheated iron blood and diamond plates?

Forget it.