You can check an official patch note here: https://ro.gnjoy.com/news/devnote/View.asp?category=1&seq=4178353&curpage=1&fbclid=IwAR3uEuzqZZJEb-O6W5xx2Zc9HVIH_DJZLB5Q9mHsg9EVD0xNaZvJqBUHQjE

The translation is down belows:

1. Dragon Knight

1.1 Servant Weapon

At level 5, Reduce skill cooldown from 150 seconds to 60 seconds
At level 5, Increase base dmg per hit from 2500% ATK to 4850% ATK
Increase the number of attacks from 2 hits to 3 hits
No longer dispel-able and clearance-able

1.2 Madness Crusher

At level 5, Increase base dmg from 8350% ATK to 20000% ATK

1.3 Storm Slash

At level 5, Increase base dmg per hit from 2200% ATK to 4050% ATK

1.4 Hack and Slasher

At level 10, Increase base dmg per hit from 7700% ATK to 8550% ATK

1.5 Dragonic Breath

Max HP % scaling increases from 12.5% to 25%
Max SP % scaling increases from 25% to 50%

2. Meister

2.1 Axe Stomp

At level 5, Increase delay after skill from 0.25 seconds to 0.7 seconds
At level 5, Increase dmg per hit from 5150% ATK to 6200% ATK

2.2 Mighty Smash

At level 10, Increase delay after skill from 0.25 seconds to 0.7 seconds
At level 10, Increase dmg per hit from 1825%/1850% (with Axe Stomp) ATK to 2140%/2180% (with Axe Stomp) ATK

2.3 Spark Blaster

At level 10, Increase dmg per hit from 9250% ATK to 12450% ATK

2.4 Triple Laser

At level 5, Increase dmg per hit from 5050% ATK to 6400% ATK

3. Shadow Cross

3.1 Savage Impact

At level 10, Increase dmg per hit from 900%/1100% (with Shadow Exceed) ATK to 1050%/1200% (with Shadow Exceed) ATK

3.2 Shadow Stab

Change the number of attacks to 3 hits regardless of cloaking or not
At level 5, Increase dmg per hit from 1750%/2000% (with Cloaking Exceed) ATK to 2750%/3250% (with Cloaking Exceed) ATK

3.3 Eternal Slash

No longer Dispel-able and Clearance-able
At level 5, Increase dmg per hit from 1325%/1825% (with Shadow Exceed) ATK to 1500%/2100% (with Shadow Exceed) ATK

4. Arch Mage

4.1 Climax

Reduce AP consumption from 150 to 125
Reduce cooldown from 300 seconds to 60 seconds

4.2 Floral Flare Road

At level 5, Increase delay after skill from 0.25 seconds to 0.75 seconds

4.3 Tornado Storm

At level 5, Increase delay after skill from 0.25 seconds to 0.75 seconds

4.4 Strantum Tremor

At level 5, Increase delay after skill from 0.25 seconds to 0.75 seconds

4.5 Rain of Crystal

At level 5, Increase delay after skill from 0.25 seconds to 0.75 seconds

4.6 Crimson Arrow

At level 5, Increase base dmg formula from 1750%/3500% MATK to 2000%/3750% MATK

4.7 Storm Cannon

At level 5, Increase base dmg formula from 6000%/7500% (with Climax) MATK to 7750%/9250% (with Climax) MATK

4.8 Rock Down

At level 5, Increase base dmg formula from 6000%/7500% (with Climax) MATK to 7750%/9250% (with Climax) MATK

4.9 Frozen Slash

At level 5, Increase base dmg formula from 4900%/6800% (with Climax) MATK to 5200%/7100% (with Climax) MATK

4.10 Mystery Illusion

At level 5, Increase delay after skill from 0.5 seconds to 0.75 seconds

4.11 All Bloom

At level 5, Increase delay after skill from 0.5 seconds to 1 second

4.12 Violent Quake

At level 5, Increase delay after skill from 0.5 seconds to 1 second

4.13 Soul Vulcan Strike

At level 5, Increase dmg per hit from 1250% MATK to 1500% MATK

4.14 Astral Strike

At level 10, Increase delay after skill from 0.5 seconds to 1 second

5. Cardinal

5.1 Framen

At level 5, Increase dmg from 4750+(Fidus Animus level x 25)% MATK/ 5250+(Fidus Animus level x 25)% (against Demon and Undead) to 6500+(Fidus Animus level x 25)% MATK/ 6750+(Fidus Animus level x 25)% (against Demon and Undead)

5.2 Pneumaticus Procella

Reduce AP consumption from 30 to 20
Change skill's property from holy attibute to neutral attibute
Add 0.5 seconds delay after skill

6. Wind Hawk

6.1 Gale Storm

Reduce cooldown from 1.2 seconds to 0.7 seconds
At level 10, Increase dmg formula from 10000% ATK to 16500% ATK

6.2 Cresive Bolt

At level 10, Increase dmg from 9400% ATK to 11500% ATK
Change standing still dmg per stack from 10% (3 times, i.e. maximum at 30%) to 40% (3 times, i.e. maximum at 120%)

6.3 Calamity Gale

Reduce AP consumption from 200 to 125
Reduce cooldown from 180 seconds to 60 seconds

7. Imperial Guard

7.1 Attack Stance

Reduce Fixed Cast Time from 1 second to 0.5 seconds
Remove 1 second Variable Cast Time
No longer Dispel-able and Clearance-able

7.2 Guard Stance

Reduce Fixed Cast Time from 1 second to 0.5 seconds
Remove 1 second Variable Cast Time
No longer Dispel-able and Clearance-able

7.3 Guardian Shield

Become AP consuming skill (for 35 AP per usage)
Reduce duration from 60 seconds to 40 seconds
Increase cooldown from 15 seconds to 25 seconds
Reduce delay after skill from 1 second to 0.3 seconds
Decrease Max HP percentage from 50% to 30%
At level 5, Reduce base durability from 250% to 125%

7.4 Cross Rain

Increase AP gain from 4 to 6 per usage
At level 10, Increase dmg per hit from 3200+(Spear&Sword Mastery level x 100)% MATK/ 4500+(Spear&Sword Mastery level x 150)% MATK (with Holy Shield) to 4500+(Spear&Sword Mastery level x 100)% MATK/ 6500+(Spear&Sword Mastery level x 150)% MATK (with Holy Shield)

7.5 Holy Shield

No longer Dispel-able and Clearance-able

7.6 Shield Shooting

Increase AP gain from 3 to 5
At level 5, Increase dmg from 14900+(Shield Mastery level x 250)% ATK to 18300+(Shield Mastery level x 500)% ATK

7.7 Overslash

Increase AP gain from 3 to 5
At level 10, Increase dmg per hit from 1600+(Spear&Sword Mastery level x 250)% ATK to 2200+(Spear&Sword Mastery level x 500)% ATK

7.8 Judgement Cross

Change skill property from holy to neutral

8. Biolo

8.1 Explosive Powder

At level 5, Increase dmg per hit from 3150%/3650% (with Research Report) to 3750%/4250% (with Research Report)

9. Abyss Chaser

9.1 Abyss Slayer

Reduce AP consumption from 150 to 120

9.2 Omega Abyss Strike

Reduce Fixed Cast Time from 1.5 seconds to 1 second
Reduce cooldown from 3 seconds to 0.7 seconds
Reduce AP consumption from 15 to 10
Change skill property from neutral to fire
At level 10, Increase dmg from 22000/23500% (against Angel and Demon) MATK to 26500/28500% (against Angel and Demon) MATK

9.3 Abyss Dagger

At level 5, Increase dmg per hit from 4600% to 7350% ATK

9.4 Deft Stab

At level 10, Increase dmg per hit from 3750% to 5400% ATK

9.5 From The Abyss

Reduce cooldown from 60 seconds to 30 seconds
Increase number of attacks from 2 hits to 5 hits
At level 5, Increase dmg per hit from 2600% to 3400% MATK
No longer Dispel-able and Clearance-able

9.6 Abyss Square

At level 5, Increase dmg per hit from 2850+(Magic Sword Mastery level x 100)% MATK to 3750+(Magic Sword Mastery level x 200)%

9.7 Chain Reaction Shot

At level 5, Increase secondary hit dmg from 12350% to 13550% ATK

9.8 Frenzy Shot

Increase AP gain from 1 to 3
At level 10, Increase dmg per hit from 6150% to 8250% ATK

10. Elemental Master

10.1 Summon Elemental Ardor

Reduce cooldown from 900 seconds to 60 seconds
Passive Mode: Increase dmg amplification of 'Fire Bolt' from 100% to 400%

10.2 Summon Elemental Diluvio

Reduce cooldown from 900 seconds to 60 seconds
Passive Mode: Increase dmg amplification of 'Cold Bolt' from 100% to 400%

10.3 Summon Elemental Procella

Reduce cooldown from 900 seconds to 60 seconds
Passive Mode: Increase dmg amplification of 'Lightning Bolt' from 100% to 400%

10.4 Summon Elemental Terremotus

Reduce cooldown from 900 seconds to 60 seconds
Passive Mode: Increase dmg amplification of 'Earth Spike' from 80% to 800%

10.5 Summon Elemental Serpens

Reduce cooldown from 900 seconds to 60 seconds
Passive Mode: Increase dmg amplification of 'Cloud Kill' from 50% to 1500%

10.6 Conflagation

Increase delay after skill from 0.5 seconds to 0.7 seconds
At level 5, Increase dmg per hit from 3750%/5750% (with Ardor) MATK to 6200%/7200% (with Ardor) MATK
At level 5, Status effect chance decreases from 60% to 3%

10.7 Diamond Storm

At level 5, Increase dmg from 8150%/14400% (with Diluvio) MATK to 12500%/20800% (with Diluvio) MATK
At level 5, Status effect chance decreases from 90% to 5%

10.8 Lightning Land

Increase delay after skill from 0.5 seconds to 0.7 seconds
At level 5, Increase dmg per hit from 3750%/5750% (with Procella) MATK to 6200%/7200% (with Procella) MATK
At level 5, Status effect chance decreases from 60% to 3%

10.9 Terra Drive

At level 5, Increase dmg from 8150%/14400% (with Terremotus) MATK to 12500%/20800% (with Terremotus) MATK
At level 5, Status effect chance decreases from 90% to 5%

10.10 Venom Swamp

Increase delay after skill from 0.5 seconds to 0.7 seconds
At level 5, Increase dmg per hit from 3750%/5750% (with Procella) MATK to 6200%/7200% (with Procella) MATK
At level 5, Status effect chance decreases from 60% to 3%

10.11 Elemental Burst

Reduce AP consumption from 30 to 15
Reduce cooldown from 5 seconds to 2 seconds
At level 10, Increase dmg from 22500%/24000% (against Dragon and Formless) MATK to 27050%/28550% (against Dragon and Formless) MATK

11. Inquisitor

11.1 Explosion Blast

At level 5, Increase dmg from 12000%/17600% (with Oleum Sanctum) to 13450%/18200% (with Oleum Sanctum) ATK

11.2 Third Punish

Reduce cooldown from 1 second to 0.7 seconds
Add 0.5 seconds delay after skill
At level 5, Increase dmg per hit from 7850% to 9450% ATK

11.3 Third Flame Bomb

Add 0.7 seconds delay after skill

12. Troubadour&Trouvere

12.1 Rhythm Shooting

At level 5, Increase dmg per hit from 3750%/4550% (with Sound Blend) ATK to 5300%/6100% (with Sound Blend) ATK

12.2 Metallic Fury

At level 5, Increase dmg from 13000%/18000% (with Sound Blend) MATK to 19250%/23250% (with Sound Blend) MATK

13. Night Watch

13.1 Hidden Card

No longer Dispel-able and Clearance-able

13.2 The Vigilante at Night

Increase AP gain from 1 to 2

13.3 Only One Bullet

Increase AP gain from 1 to 2

13.4 Spiral Shooting

Increase AP gain from 1 to 2

13.5 Magazine for One

Increase AP gain from 1 to 2

13.6 Wild Fire

Increase AP gain from 1 to 2

14. Shinkirou&Shiranui

14.1 Shadow Dance

At level 10, Increase dmg formula from 8050+(Shadow Hunting level x 500)% ATK to 9750+(Shadow Hunting level x 500)% ATK

14.2 Shadow Flash

At level 10, Increase dmg from 9000+(Shadow Dance level x 500)% ATK to 11000+(Shadow Dance level x 1000)% ATK

14.3 Huuma Shuriken-Construct

At level 10, Increase dmg from 12600+(Huuma Shuriken-Grasp level x 300)% ATK/ 15600+(Huuma Shuriken-Grasp level x 300)% (explosion) to 15900+(Huuma Shuriken-Grasp level x 500)% ATK/ 18400+(Huuma Shuriken-Grasp level x 500)% (explosion)

14.4 Kunai-Rotation

At level 5, Increase dmg per hit from 4300+(Kunai-Distortion level x 350)% ATK to 5050+(Kunai-Distortion level x 350)% ATK

14.5 Kunai-Refraction

At level 10, Increase dmg per hit from 3800+(Kunai-Rotation level x 100)% ATK to 4450+(Kunai-Rotation level x 100)% ATK

14.6 Red Flame Cannon

At level 10, Increase dmg from 10500+(Darkening Cannon level x 700)% MATK to 11600+(Darkening Cannon level x 700)%

14.7 Cold Blooded Cannon

At level 10, Increase dmg from 8850+(Darkening Cannon level x 400)% MATK to 9950+(Darkening Cannon level x 700)%

14.8 Thundering Cannon

At level 10, Increase dmg from 10000+(Darkening Cannon level x 700)% MATK to 11600+(Darkening Cannon level x 700)%

14.9 Gold Dragon Cannon

At level 10, Increase dmg from 9950+(Darkening Cannon level x 150)% MATK to 15800+(Darkening Cannon level x 150)%

15. Heaven Emperor

15.1 Midnight Kick

At level 5, Increase dmg from 6600+(Sky Mastery level x 25)%/ 8800+(Sky Mastery level x 25)% ATK (during Midnight Stance) to 8300+(Sky Mastery level x 25)%/ 10500+(Sky Mastery level x 25)% ATK (during Midnight Stance)

15.2 Dawn Break

At level 5, Increase dmg from 2400+(Sky Mastery level x 25)%/ 3400+(Sky Mastery level x 25)% ATK (during Dawn Stance) to 4100+(Sky Mastery level x 25)%/ 5100+(Sky Mastery level x 25)% ATK (during Dawn Stance)

16. Soul Ascetic

16.1 Talisman of Blue Dragon

At level 5, Increase dmg from 9100+(Talisman Mastery level x 75)% MATK/ 11600+(Talisman Mastery level x 75)% MATK (with Blessing of the Four Directions) to 12100+(Talisman Mastery level x 75)% MATK/ 15700+(Talisman Mastery level x 75)% MATK (with Blessing of the Four Directions)

16.2 Talisman of Red Pheonix

At level 5, Increase dmg from 7450+(Talisman Mastery level x 75)% MATK/ 9650+(Talisman Mastery level x 75)% MATK (with Blessing of the Four Directions) to 8650+(Talisman Mastery level x 75)% MATK/ 10850+(Talisman Mastery level x 75)% MATK (with Blessing of the Four Directions)

17. Hyper Novice

17.1 Double Bowling Bash

At level 10, Increase dmg per hit from 3200+(Self-Study Tactics level x 30)% ATK to 4250+(Self-Study Tactics level x 30)% ATK

17.2 Shield Chain Rush

At level 10, Increase dmg from 5700+(Self-Study Tactics level x 30)% ATK to 11350+(Self-Study Tactics level x 30)% ATK

17.3 Spiral Pierce Max

At level 10, Increase dmg formula from [8700+(Self-Study Tactics level x 30)] x Size Factor% ATK to [16000+(Self-Study Tactics level x 30)] x Size Factor% ATK

17.4 Breaking Limit

Skill amplification of Double Bowling Bash and Shield Chain Rush from 70% to 120%

17.5 Hell Drive

At level 10, Increase dmg from 8500+(Self Sorcery Study level x 40)% MATK to 10700+(Self Sorcery Study level x 40)%

18. Spirit Handler

18.1 Chulho Sonic Claw

At level 7, Increase dmg from 12400+(Mystical Creature Mastery level x 50)% ATK/ 15200+(Mystical Creature Mastery level x 100)% ATK (when learning Commune with Chulho) to 16500+(Mystical Creature Mastery level x 50)% ATK/ 19300+(Mystical Creature Mastery level x 100)% ATK (when learning Commune with Chulho)

18.2 Hyunrok Cannon

At level 7, Increase dmg from 11900+(Mystical Creature Mastery level x 50)% MATK/ 14000+(Mystical Creature Mastery level x 100)% MATK (when learning Commune with Hyunrok) to 154500+(Mystical Creature Mastery level x 50)% MATK/ 18250+(Mystical Creature Mastery level x 100)% MATK (when learning Commune with Hyunrok)

Keep in mind that this update is still not final, there could be different in the real patch.