User blog comment:Plexioth- xD/Monster Hunter 3 Ultimate/@comment-87.170.96.156-20120902133936/@comment-87.185.161.157-20120903205003

it's the new event hammer "Crazy D" with recovery effect. (u can see it best at 3:00)

http://mh3gf.blog.fc2.com/blog-entry-628.html