Answer:
Forward Iām heavy, but backwards Iām not.
Stealthy as a shadow in the dead of night, cunning but affectionate if given a bite. Never owned but often loved. At my sport considered cruel, but that's because you never know me at all.
There are two bodies on the floor. They are surrounded by water and broken glass. How did they die?
I have a face, yet no senses. But I don't really care, because time is of the essence.
Put into a pit, locked beneath a grate, guarded through the night, yet it still goes out.
Almost everyone needs it, asks for it, gives it. But almost nobody takes it.