User blog comment:PitchBlack696/Monster Hunter Portable 3rd/@comment-3313096-20110106200334/@comment-3271274-20110109160455

well, that's not an official name for it, another name for it is Weakness Slayer (but too long so I call it Stinger) you can get that skill from Rathalos armor also, it increase your chance to do critical hit even your weapons have 0% affinity whenever you hit the monster's weak point (obviously for most monsters, their head is the weak point :D) note: It's not like Critical Draw lol