Answer:
My teeth are sharp my back is straight to cut things up it is my fate.
In a tunnel of darkness lies a beast of iron. I can only attack when pulled back. What am I?
So cold damp and dark I am. To stay you would refrain yet those who occupy me do never complain.
I can bring tears to your eyes; resurrect the dead, make you smile, and reverse time. I form in an instant, but I last a life time. What am I?
I make a loud sound when I'm changing. When I do change I get bigger but weigh less. What am I?
What made Cyclops quit teaching?