I don't think we are told what the clay mixed with iron refers to.
One needs to add all of the clues of the entire Bible together to see the larger picture. Clay is the 'seed of men', literally sperm/DNA. It is the ingredients to make a human, or any kind of life for that matter. The KJV is the clearest translation:
Daniel 2:43 - And whereas thou sawest iron mixed with miry clay, they shall mingle themselves with the seed of men: but they shall not cleave one to another, even as iron is not mixed with clay.
They do not 'cleave' as in normal conception between a man and a woman's seed. The verse is implying that the mingling of DNA is not done in a natural way. Think of the image and mark of the beast. Think of the return of the Giants. It all has to be added to the equation which the OP is not doing. The meaning is hugely profound and terrifying. We are almost there.
The Stone that destroys the image is Abraham's Seed. Thus, it is the final 'battle of seeds' that began in the Garden of Eden.
Genesis 3:15 - And I will put enmity between thee and the woman, and between thy seed and her seed; it shall bruise thy head, and thou shalt bruise his heel.
Feet in the Old Testament are sometimes related to male genitals and themes of childbirth. The symbolism in this thread is not being properly understood. The 'Giant' (hint hint) image is all about the DNA of mankind becoming more and more inferior after each generation until it becomes weak and broken.
Again, clay is the ingredients that people are made of. Iron is symbolic of high technology. The two will be mixed, hence the Mark of the Beast. The Little Horn of Daniel 7 will be the one to bring this transhuman agenda to fruition. God has no choice but to step in and do something about it. So far, no one has offered any reason as to why God has to do something so drastic as to sterilize the entire planet of contamination.
Anyhow, there are tons of videos, books and websites that teach this stuff. Not sure why the folks here are not up to speed. Spirit at work perhaps?

