Of the four ancient bodily fluids, I possess much, Me and my brother are often marginalised by man, But previously, we were adored by monarchs, What am I?

a goblin-like creature, straw to gold spun, first born child promised, say his name to win.

I’m sometimes a fraudulent business scheme. Or a representation nutritional needs. Lastly, I’m structures found around the world, ancient, majestic, serene.

Drop my letter last to bring the lighting down to low Nix my third to end it all, the curtain stops the show Ditch my first, you've got two words referring to yourself But altogether, thirty second president is smelt

Small, shrunken No longer serving the purpose I once did. I'm still here though. A remnant of what I was.