Berikut ini adalah informasi perubahan skill terkait 16th Anniversary Update dari Korea Ragnarok Online. Skill berikut akan disesuaikan dengan meningkatkan level maksimal dan meningkatkan beberapa efeknya.
Rune Knight

- Enchant Blade
- Increases max level from 5 to 10.
- Changes SP consumption per level.
- Sonic Wave
- Increases max level from 5 to 10.
- Improves damage formula.
- Improve hit rate depends on skill level.
- Changes SP consumption per level.
Royal Guard

- Shield Press
- Increases max level from 5 to 10.
- Removes Stun status inflicting.
- Improves damage formula.
- Splits damage display to 5 hit.
- Genesis Ray
- Increases max level from 5 to 10.
- Changes damage type from holy (physical + magical) damage to holy magical damage.
- Reduces skill cooldown and delay.
- Changes SP consumption per level.
- Removes requirement of Banding party members and also removes increased damage from Banding party members too.
Mechanic

- Power Swing
- Increases max level from 5 to 10.
- From level 6. Skill delay has been reduced by half.
- Arm Cannon
- Increases max level from 3 to 5.
- Increases area of effect depends on skill level.
Genetic

- Cart Tornado
- Increases max level from 5 to 10.
- Removes knockback effect.
- Skill cooldown is fixed to 2 seconds.
- Skill delay is increased by 1 second.
- Improves damage formula.
- Splits damage display to 3 hit.
- Spore Explosion
- Increases max level from 5 to 10.
- Increases nearby target damage from 75% to 100%.
- Explosion delay is fixed to 2 seconds.
- Improves damage formula.
Guillotine Cross

- Weapon Blocking
- When blocking is successful. Gains “Counter state” for 10 seconds.
- Counter Slash
- Increases max level from 5 to 10.
- Changes skill condition to can be used while “Counter state” is active, not when Weapon Blocking is successful.
- Improves damage formula.
- From level 6. Increases area of effect to 5×5.
Shadow Chaser

- Fatal Menace
- Increases max level from 5 to 10.
- Removes teleport effect.
- When uses skill while dagger is equipped. Damage will be doubled.
- From level 7. Increases Hit rate.
- Feint Bomb
- Increases max level from 3 to 10.
- Increases travel distance depends on skill level.
Warlock

- Freezing Spell
- Increases max level from 5 to 10.
- Tetra Vortex
- Increases max level from 5 to 10.
- From level 6. The skill also deal damage to nearby enemies too.
- Since it will be multiple target from level 6. Damage formula from level 6 will be changed.
Sorcerer

- Spell Fist
- Increases max level from 5 to 10.
- Duration depends on skill level.
- Increases attack count to 3 times of skill level.
- Varetyr Spear
- Increases max level from 5 to 10.
- Changes damage type from wind (physical + magical) damage to wind magical damage.
- Increases SP consumption.
- Increases area of effect.
- Splits damage display to 3 hit.
Archbishop

- Judex
- Increases max level from 5 to 10.
- Renovatio
- Increases max level from 1 to 4.
- Increases HP recovery amount depends on skill level.
- Duration depends on skill level.
Sura

- Fallen Empire
- Increases max level from 5 to 10.
- Reduces SP consumption.
- From level 6. Reduces Spirit Sphere consumption from 2 to 1.
- Improves damage formula.
- knuckle Arrow
- Increases max level from 5 to 10.
- From level 6. Removes Spirit Sphere consumption.
Ranger

- Aimed Bolt
- Increases fixed casting time to 1 second. Reduces variable casting time by half.
- Adds 1 second cooldown.
- Lower damage formula.
- Number of attack won’t depend on the immobilize status of target.
- Fixes SP consumption to 40 for all skill level.
- Trap Research
- Increases max level from 5 to 10.
Wanderer & Minstrel

- Metallic Sound
- Increases max level from 5 to 10.
- Splits damage display to 2 hit.
- Removes SP reduction effect.
- Severe Rainstorm
- Can be used while Whip or Musical Instrument is equipped.
- When using skill while Whip or Musical Instrument is equipped. Damage formula will higher than using bow.