Board Thread:Questions and Answers/@comment-24972506-20141023142341/@comment-24145588-20141023145153

It's a double-bitted battleaxe. The silver semicircular parts are the two bits (not to say that it's a two-bit weapon), the long black part sticking up to the right is the haft.

In context with the Halloween theme, it's probably supposed to be a headsman's axe.

I had to look at it a couple of times myself to get it.