This is the Vorpal Blade from Alice: Madness Returns by Jouzu Mania. American McGee's Alice holds this as her primary weapon in the game and I just found it so lovely that I had to make it. I made this in two days, the pieces aren't that small so I didn't lose my patience with this one like I did with the Kissing Dolls which took me two years to finish because it had such annoyingly small pieces.
Either way, I love them both but the Vorpal blade appeals to my macabre loving side and tickles my imagination like no other, which is why I even swung it around when I finished it just like in the game. I would love to cosplay as Alice and hold this someday, when I get the itch to go out and mingle with people I don't know.