Key

Smooth silvery, brass
Not old, not new
But unique
And special

Like a shapeshifter
However it does not change shape or size
What it unlocks
changes as your thoughts change

A mystery, a riddle
What is its use?
To open a treasure chest?
Or the key to a a hidden city?

I may never know the truth of it
But that does not matter
For it has already earned a very special job
As the key of imagination

As an undercover agent
Facing difficulties
Kind but fair
When the truth is finally revealed