Answer:
What is the edge of earth and bread?
I invade your home once a yearโฆbut only if youโve been good.
While you were folding a letter you got me. Usually you will do whatever it takes to avoid me but now you can't help but find me.
Though not a plant I have leaves. though not a beast I have spine. Though many wouldn't need me I am more valuable than wine.
What is harder to catch the faster you run?
What never gets any wetter no matter how hard it rains?