Answer:
I rise and fall no matter what, only at finals rest do I not budge. What am I?
They come at night without being called and are lost in the day without being stolen. What are they?
With pointed fangs I sit and wait; with piercing force I crunch out fate; grabbing victims, proclaiming might; physically joining with a single bite. What am I?
What belongs to you but others use it more than you do?
People see through me, but none pass through without killing me. I can be anywhere, and can be seen double or single. What am I?
It has no top or bottom, but it can hold flesh, bones, and blood all at the same time.