Answer:
A box without hinges, lock or key, yet golden treasure lies within.
Useful tool for who in darkness dwell. Within you, corrupting like a deadly spell.
Ripped from my mother's womb. Beaten and burned, I become a blood thirsty killer.
When it comes in, From sea to shore, Twenty paces you'll see, No less, no more.
There are two bodies on the floor. They are surrounded by water and broken glass. How did they die?
I have two eyes in the front and a lot of eyes on my tail