If you are roaming the new 'Crabon' server in Arthdal Chronicles, you can snag one Rare Skill Selection Chest every month using Valor Coins. It is a treasure trove of growth-boosting skills, but with a monthly limit, the real question is—which one actually moves the needle? We at KookminTree have done the legwork to sort this out for you.

Q. Where exactly do I find these Rare Skill Selection Chests?
A. You can pick them up from the Valor Coin Shop or as a reward for hitting 7th-stage milestones in the Growth Guide.

These chests aren't exactly mythical beasts; there are several ways to get your hands on them. The most reliable route is the Valor Coin Shop, where one chest will set you back 4,000 coins. Since you can consistently farm these by taking down world bosses like Vargon and Bari, make sure to grab your monthly allowance. As mentioned, the 7th-stage Growth Guide also provides a chest upon hitting 75% completion. Keep an eye out for Black Night Archipelago treasure chests or boss drops like Karakuda, as they occasionally cough up these boxes, albeit at a lower probability.

Q. What should be at the top of my priority list?
A. Focus on skills that boost your Final Damage Rate first.

The Rare Skill Selection Chest contains a mix: three class-specific active skills, three class-specific passive skills, and two shared passive skills. Your best bet is to go for the shared passive skills that increase Final Damage Rate, as these offer a massive performance jump across the board. Prime examples include Archer's 'Immersion', Stormbringer's 'Breeze', Dangri's 'Resonating Force', and Fighter's 'Unstoppable Will'.

Beyond that, the priorities shift depending on your class. Archers should look at 'Rapid Fire', Dangri at 'Skilled Stance', and Divine Knights at 'Acceleration Sword'. These are critical for enhancing the gauge skills you rely on for grinding, boss encounters, and PvP. Don't forget to upgrade key skills like 'Aiming Shot', 'Dance of the Falling Petals', and 'Acceleration Sword' to the Rare grade—you can easily grab the necessary Skill Upgrade Books for 48,000 Mercenary Coins.

On the flip side, skills like Warrior's 'Steadfastness' or Priest's 'Hand of Relief' aren't exactly game-changers for pure PvE grinding. Given the nature of the new Crabon server, you are better off prioritizing raw damage efficiency with sub-class shared skills like 'Unstoppable Will' or 'Breeze'. Here is the recommended pecking order by class.

[Archer]

= Tier 1: Rapid Fire, Immersion
= Tier 2: Sub-class shared skills (Fighter's Unstoppable Will, Stormbringer's Breeze, Priest's Self-Healing, etc.)
= Tier 3: Multi-Shot
= Tier 4: Mark, Predictive Shot
= Tier 5: Insight, Archer's Might, Discipline, Sub-class shared skills (Fighter's Might, etc.)

[Stormbringer]

= Tier 1: Breeze
= Tier 2: Sub-class shared skills (Fighter's Unstoppable Will, Priest's Self-Healing, etc.)
= Tier 3: Thundercloud, Eye of the Storm
= Tier 4: Whirlwind, Headwind
= Tier 5: Discipline, Stormbringer's Might, Onslaught, Sub-class shared skills (Fighter's Might, etc.)

[Dangri]

= Tier 1: Resonating Force, Skilled Stance
= Tier 2: Sub-class shared skills (Fighter's Unstoppable Will, Stormbringer's Breeze, Priest's Self-Healing, etc.)
= Tier 3: Energy of Muryeong
= Tier 4: Slaughter, Spirit Transformation
= Tier 5: Discipline, Dangri's Might, Onslaught, Sub-class shared skills (Fighter's Might, etc.)

[Priest]

= Tier 1: Sub-class shared skills (Fighter's Unstoppable Will, Stormbringer's Breeze, etc.)
= Tier 2: Self-Healing
= Tier 3: Binding of Authority
= Tier 4: Ground of Salvation
= Tier 5: Discipline, Priest's Might, Sub-class shared skills (Fighter's Might, etc.)
= Tier 6: Salvation, Hand of Relief, Prayer of Resurrection

※ Note: If you prefer healing output over grinding speed, prioritize 'Ground of Salvation', 'Salvation', 'Hand of Relief', and 'Prayer of Resurrection' instead.

[Divine Knight]

= Tier 1: Acceleration Sword, Firm Belief
= Tier 2: Sub-class shared skills (Fighter's Unstoppable Will, Stormbringer's Breeze, Priest's Self-Healing, etc.)
= Tier 3: Master of the Divine Sword
= Tier 4: Spin Slash, Heresy Sentence
= Tier 5: Discipline, Divine Knight's Might, Sub-class shared skills (Fighter's Might, etc.), Rigidity

[Fighter]

= Tier 1: Unstoppable Will
= Tier 2: Headwind
= Tier 3: Sub-class shared skills (Stormbringer's Breeze, Priest's Self-Healing, etc.)
= Tier 4: Rage Release, Ground Slam
= Tier 5: Skull Splitter
= Tier 6: Discipline, Fighter's Might, Onslaught, Sub-class shared skills (Stormbringer's Might, etc.)

[Warrior]

= Tier 1: Sub-class shared skills (Fighter's Unstoppable Will, Priest's Self-Healing, etc.)
= Tier 2: Shout of Protection, Shield Throw
= Tier 3: Seasoned Defense
= Tier 4: Shield of Valor
= Tier 5: Discipline, Warrior's Might, Onslaught, Sub-class shared skills (Fighter's Might, etc.)
= Tier 6: Steadfastness

※ Note: If survival is your main concern over raw speed, prioritize 'Seasoned Defense' and 'Steadfastness'.

[Twinblade]

= Tier 1: Sharp Sword Energy
= Tier 2: Random Sword Mark
= Tier 3: Sub-class shared skills (Fighter's Unstoppable Will, Stormbringer's Breeze, Priest's Self-Healing, etc.)
= Tier 4: Triple Strike
= Tier 5: Continuous Slash
= Tier 6: Blessing of the Sword
= Tier 7: Discipline, Twinblade's Might, Ruthlessness, Sub-class shared skills (Fighter's Might, etc.)