Feel free to leave your answers in the comments.
1
Think it, I know it
Hide it, I reveal it
Set a standard, I’m below it
Claim your thought, I will steal it
2
On it prowls, leaving scars in its wake
The implacable leviathan, old as the earth
Claims all that the sun can’t defend
3
A colossal wall of grey granite,
Guarded by soldiers brandishing bellowing trumpets,
Hides a city of wealth and beauty,
Should you collapse it.
4
I am a sandwich
Inspect me, and see my name.
My bread is too small
5
I am a mask that hides the face inside,
I am a costume that contrasts the wearer,
Yet I slyly betray the secrets I hide,
And those who know me know my bearer.
Carter's Compendium 