Im making just copy/paste, but i think this will be usefull for some people! Here have info about what skill gives any FS!
All Classes
Protection of Rune: Increases M. Def.
Protection of Elemental: Increases resistance to elemental attacks
Protection of Alignment: Increases resistance to Holy and Dark attacks
All Fighter Classes
Fighter’s Will: Increases P. Atk. when melee weapon is used
Archer’s Will: Increases P. Atk. when bow is used
Knight Classes
Anti Magic Armor: Greatly increases M. Def. momentarily
Hell Knight
Seed of Revenge: Increases P. Atk., and additionally increases Critical Rate depending on stage increase
Insane Crusher: Ranged attack when Seed of Revenge reaches stage 3
Hell Scream: Decreases P. Def and M. Atk. and causes fleeing
Phoenix Knight
Spirit of Phoenix: Increases P. Def., and increases resistance to Darkness and Fire depending on stage increase
Flame Icon: Greatly increases party members’ battle abilities
Eva’s Templar
Eva’s Will: Increases M. Def., and increases Water-type attack and Critical Rate depending on the stage increase
Touch of Eva: Greatly restores party members’ HP and increases HP regeneration.
Shillien Templar
Pain of Shillien: Increases Critical Damage, increases Wind-type attack, and bestows Vampiric effect depending on the stage increase
Touch of Shillien: Greatly decreases the maximum CP of nearby targets, and cancels buffs
Adventurer, Wind Rider, and Ghost Hunter
Sixth Sense: Increases Evasion when HP is below 30%
Expose Weak Point: Decreases the target’s P. Def. and increases your target’s chance to be critically hit
Adventurer
Exciting Adventure: Increases Speed, Evasion, Success Rate of deadly attack, Physical skill dodge
Wind Rider
Wind Riding: Increases Speed, Evasion, Success Rate of deadly attack, Physical skill dodge
Ghost Hunter
Ghost Walking: Increases Speed, Evasion, Success Rate of deadly attack, Physical skill dodge
Sagittarius
Flame Hawk: Range attack using a bow
Moonlight Sentinel
Arrow Rain: Range attack using a bow
Ghost Sentinel
Ghost Piercing: Range attack using a bow
Dreadnought
Dread Pool: Decreases speed of nearby targets, causing fleeing
Duelist
Weapon Blockade: Cancels the target’s weapon
Grand Khavatari
Force of Destruction: Inflicts damage and continuously decreases HP
Titan
Demolition Impact: Range attack on surrounding targets
Maestro
Golem Armor: Transforms into a golem with increased battle abilities
Archmage
Flame Armor: Increases resistance to Fire / Added damage effect to attacking target
Mystic Muse
Frost Armor: Increases resistance to Water / Decreases speed of attacking target
Storm Screamer
Hurricane Armor: Increases resistance to Wind / Decreases attack speed of attacking target
Soultaker
Vampiric Mist: Inflicts damage on nearby targets and absorbs HP
Arcana Lord, Elemental Master, and Spectral Master
Servitor Barrier: Momentarily makes the servitor invincible
Excessive Loyalty: When the master incurs damage, the servitor’s battle skills are increased
Mutual Response: When the master attacks, the servitor’s HP/MP are restored
Cardinal
Sublime Self-Sacrifice: Consumes HP and makes party members invincible
Eva’s Saint
Blessing of Eva: HP, MP, and CP are all restored, and debuffs have a chance of being deleted
Shillien Saint
Lord of Vampire: Greatly absorbs as HP a portion of the damage inflicted on a target
Throne Root: Causes Hold on nearby targets, and continuously consumes HP
Dominator
Restricts the CP, HP, and MP recovery of nearby targets
Trickster
Range attack using a crossbow
Soul Hound
Causes Paralysis on nearby targets
Other New Skills
Skills Acquired through the Skill Trainer NPCs
New Kamael class skills that are below level 80 have been added. These skills can be acquired through the Skill Trainer NPCs.
All Kamael
Soul Cleanse: Cancel all debuffs
Berserker and Arbalester
Soul Barrier: Increases resistance for M. Def. and bow attacks
Soul Breaker
Curse of Life Flow: HP recovery when attacking a cursed target
Soul Strike: Soul-throwing attack
Soul Vortex: Decreases the target’s speed, attack speed, and casting speed
Soul Vortex Extinction: Explodes the Soul Vortex to inflict damage
Trickster
Betrayal Mark: Inflicts damage on the target’s party while attacking
Berserker
Rush Impact: Charges to inflict shock and damage
Mass Disarm: Cancels nearby target weapons
Soul Breaker and Inspector
Lightning Barrier: Inflicts Paralysis on the target who attacks you
Arcana Lords, Elemental Masters, Spectral Masters, Eva’s Templars, and Shillien Templars who reach level 80 can acquire a new skill called Summon Smart Cubic. A Smart Cubic can fully check its master's condition and cancel every type of debuff.
A song/dance skill that raises resistance to bows has been added. These skills are acquired at level 75.
Sword Muse
Song of Windstorm: Increases party members’ resistance to bow attacks.
Spectral Dancer
Dance of Blade Storm: Greatly incrases party members’ resistances to bow attacks and decreases M. Atk.
A skill that permits battle efficiency by receiving two types of buff effects with just one buff has been added.
Prophet
Improve Combat: Shield + Might (Level 70)
Improve Condition: Bless the Body + Bless the Soul (Level 70)
Elven Elder
Improve Shield Defense: Bless Shield + Advanced Block (Level 70)
Improved Movement: Wind Walk + Agility (Level 70)
Shillien Elder
Improve Magic: Empower + Magic Barrier (Level 70)
Improve Critical: Focus + Death Whisper (Level 70)
Warcryer
Chant of Combat: Shield + Might (Level 70)
Chant of Critical: Focus + Death Whisper (Level 72)
Chant of Blood Awakening: Vampiric Rage + Haste (Level 74)