Answer:
Inside a burning house, this thing is best to make. And best to make it quickly, before the fire's too much to take.
Useful tool for who in darkness dwell. Within you, corrupting like a deadly spell.
I can be written, I can be spoken, I can be exposed, I can be broken.
I run around the city, but I never move.
What word is the same written forward, backward and upside down?
People take me on walks and I run and have fun. What am I?