Answer:
Put into a pit, locked beneath a grate, guarded through the night, yet it still goes out.
Scythe of darkness, Shadowโs light. Guiding eye of thirteenth sight.
What can you catch but not throw?
What is it that you must give before you can keep it.
Big as a biscuit, deep as a cup, but even a river canโt fill it up. What is it?
I have two eyes in the front and a lot of eyes on my tail