Mastery Weapon Skills

First introduced in the December 2011 Version Update, Mastery Weapon skills become available to players who have finished the quest Martial Mastery and have obtained the Heart of the bushin. Merit Points may then spent in the new "Weapon Skills" merit point category. The first merit rank upgrade unlocks access to the weapon skill, further upgrades increases the potency of the stat modifier for calculating the Weapon Skill's damage. All of these Weapon Skills require the player be level 96 or higher and have reached 357 in the associated combat skill.

The December 2015 Version Update brought with it Aeonic Weapons, which when equipped grant access to these weapon skills at 5/5 merit rank potency regardless of quest completion or merit point investment.