User blog comment:Kogath/Monster Hunter 4 Ultimate for the Nintendo 3DS/@comment-5805144-20141018020029/@comment-24867901-20141018115204

I think It just a rock have you ever hit Dia/Mono blos in head,Hammer always bounce off them but when you hit one on Diamyo back it is one of weakness. so it could only go few ways

1. We get new Bloss(yes it's blos with "s") variant with head as weakness.(My dream as a hammer user)

2. It just a rock nothing more.

but then agian you also bounce off gravios head so I couldn't be sure it's a rock(since gravios is rock-dragon and we probably hunt it for cat-megaman armor(Rockman)).