Lefthand Mastery

Left-Hand Mastery Max Level: 5 12Requirement: Right-Hand Mastery 2 Skill Form: Passive Description: Increases the damage of the weapon in the left hand when equipped with dual weapons. Without this skill, equipping two weapons at once reduces the Attack Power of the weapon in the left hand to only 30% during auto-attacks. [Lv 1]: 40% damage [Lv 2]: 50% damage [Lv 3]: 60% damage [Lv 4]: 70% damage [Lv 5]: 80% damage Comments: Both Left and Righthand mastery skills only affect auto-attacks. When using any skill while dual yielding, the game will calculate damage using only the atk of your Right hand weapon and completely ignore the ATK of your Left hand weapon. There's no dual yielding penalty when using skills. Left and Righthand masteries are only necessary if you are going to auto-attack. This skill does nothing when using a Katar. As of the latest rAthena implementation, there are a few things to keep in mind. All weapon cards, whether they are on the Right or Left hand, are only applied to the Right Hand, which is your main weapon. While there is a configuration option to change this, the default is for cards to only count towards the Right Hand. Add to that the fact that EDP now only affects the Right Hand. As such, even on a fully geared and carded Assassin Cross with EDP active, the Left Hand will not be boosted, making it entirely possible that your Left Hand attack will be doing less than 10% of your total damage output. An exception to the Card application rule are +% Crit Damage cards(bCritAtkRate, such as Mobster and The Paper). Exclusively for those, the damage increase applies to both the Right and Left Hand swings. However, those are not only hard to obtain, but difficult to use, since Double Attacks in Pre-Renewal cannot be Critical Attacks at the same time.