Thread:Su712/@comment-27324004-20160521003506/@comment-25669516-20160521010407

It was a Halloween Special weapon. During that update there was a special mysterious chest available in the shop which you could buy for around 25 gems or so. It randomly awarded you with this weapon along with a Halloween special armor, helm and ranged weapon as well.

I don't know any details about its stats etc as my game was crashing a lot at that time so I couldn't play that update. Sorry :(