Answer:
Once you know it exists, it no longer exists. What is it?
I have a ring, but no hands. I used to be plugged into the wall but now I follow you every where. What am I?
What is always coming but never arrives?
What has to be broken before you can use it?
What word in the dictionary is weird?
Though not a plant, has leaves. Though not a beast, has spine. Though many wouldn't need this thing, It's more valuable than wine.