Answer:
What relies on columns but isn't a house, and asks for help but can't speak itself?
What can't you see, hear or feel, until its too late. What shadows love, and shopkeepers hate?
Talks like this, a green wise man does. Guess my clue, you will.
I drive men mad for love of me. Easily beaten, never free.
I am the red tongue of the earth, that buries cities.
What do you purposefully put lots of in and on your body, but run away from when you encounter it outside?