Answer:
What can't you see, hear or feel, until its too late. What shadows love, and shopkeepers hate?
Not a burden for its weight and daily carried out, He who takes it wishes it had never come about
With pointed fangs it sits in wait. With piercing force it doles out fate, over bloodless victims proclaiming its might. Eternally joining in a single bite.
You can hold it without using your hands or arms. What is it?
Vikings use this for warmth.
If itβs information you seek, come and see me. If itβs pairs of letters you need, I have consecutively three. What am I?