The skill Blunt Mastery is a skill for blacksmiths and collectors and is available upon level 20. It increases the attack and defense of blunt weapons by +1 , +1 per level with a rare exception of not giving an attack bonus.
In-game description: Experience and training grant you bonus stats while bearing a blunt weapon.
In-game effect description: Advancing this skill increases bonus granted to stats.
The skill cap for Blunt Mastery increases every two levels by +1. This can be written as:
cap = rounddown((n-18)/2) with n as player level
See Talk:Blunt Mastery for effects of BM0 to BM12 for all available blunts in the game.[as of 2018-06-21]