Answer:
What weaves webs as they grow?
I am a box that holds keys without locks, yet they can unlock your soul.
A seed am I, three letters make my name. Take away two and I still sound the same.
Once they sailed the sea, now they surf the web
A shimmering field that reaches far. Yet it has no tracks, And is crossed without paths.
A doctor might remove one from the neck of a Dracula victim.