Its an Iceberg
Looking at my face, I'm no more than six.
Look at the rest of me and I'm 21.
You'll see my twin and me in Las Vegas.
Say my name and you'd be uttering a threat.
What am I?
Stronger than steel, yet lighter than cotton
Found in a corner, forever forgotten
I bother so many, but marvel a few
You can't seem to make me
I'm a mystery to you.