I was taking a look at .KOR language files and found the skill descriptions of Warlock and Mystic, keep in mind that Neowiz is still working on them so they're not 100% ready. However these skills will give you a general idea of what Mystic is.
Mystic Deal: Mystic's HP is consumed by 10% every second while Mystic's MP is restored by 20% every second
Mystic Blessing: Heals a friendly target by X every second, once the effect disappears it heals by Y (similar to LifeBloom in WoW)
Grudge: Deals X amount of damage every second, if Aura of Pain is active on the enemy target, it will deal an additional 30% of damage
Surprise Attack: Casts a frontal wave to interrupt enemy casting. Not affected by Global cooldown.
Aura of Regeneration: Heals every ally within 30m radius by X every 3 seconds, it consumes X MP every 3 seconds while the aura is active. Only an aura at time.
Aura of Pain: Deals X amount of damage every 3 seconds to enemies within 30m radius. It consumes X MP every 3 seconds while the aura effect is active. Only an aura at time.
Cure Wave (or Healing Wave): Heals up to 5 party members within 9m radius. if you use another recovery skill in 6 seconds, MP consumption is increased.
Nightmare: Deals X amount of damage every 3 seconds over 15 seconds
Focus: The friendly (or enemy) target affected by Focus will receive boosted effects based on the active aura.
Mythical Wave: Casts a frontal wave that deals X amount of damage and knockbacks the enemies
Gale: Boost movement speed by 15% to allies within 30m radius. Unable to use in combat. Only an aura at time.
Pray 1: Mystic dedicates himself to heal an ally, including the doubling of renewal energy. You can dedicate to one target at time.
Purify: It will remove X amount of beneficial effects on an enemy target.
Maze: Deals X amount of damage to an enemy target, if Nightmare is active it will increase its duration by 3 seconds
Delusion: It reduces the attack power of enemies within 30m radius by 10%.
Lethargy: Increase additional received damage by 10% (basically reduces physical\magical defense) to enemies within 30m radius. MP is consumed while the effect lasts.
Mystic Deal: Mystic's HP is consumed by 10% every second while Mystic's MP is restored by 20% every second
Mystic Blessing: Heals a friendly target by X every second, once the effect disappears it heals by Y (similar to LifeBloom in WoW)
Grudge: Deals X amount of damage every second, if Aura of Pain is active on the enemy target, it will deal an additional 30% of damage
Surprise Attack: Casts a frontal wave to interrupt enemy casting. Not affected by Global cooldown.
Aura of Regeneration: Heals every ally within 30m radius by X every 3 seconds, it consumes X MP every 3 seconds while the aura is active. Only an aura at time.
Aura of Pain: Deals X amount of damage every 3 seconds to enemies within 30m radius. It consumes X MP every 3 seconds while the aura effect is active. Only an aura at time.
Cure Wave (or Healing Wave): Heals up to 5 party members within 9m radius. if you use another recovery skill in 6 seconds, MP consumption is increased.
Nightmare: Deals X amount of damage every 3 seconds over 15 seconds
Focus: The friendly (or enemy) target affected by Focus will receive boosted effects based on the active aura.
Mythical Wave: Casts a frontal wave that deals X amount of damage and knockbacks the enemies
Gale: Boost movement speed by 15% to allies within 30m radius. Unable to use in combat. Only an aura at time.
Pray 1: Mystic dedicates himself to heal an ally, including the doubling of renewal energy. You can dedicate to one target at time.
Purify: It will remove X amount of beneficial effects on an enemy target.
Maze: Deals X amount of damage to an enemy target, if Nightmare is active it will increase its duration by 3 seconds
Delusion: It reduces the attack power of enemies within 30m radius by 10%.
Lethargy: Increase additional received damage by 10% (basically reduces physical\magical defense) to enemies within 30m radius. MP is consumed while the effect lasts.
And on this English patch, skills translate or still on korean ?
or give me link for assassin skills, and i try with googletranslate to translate for me , i cant find assasin skills on any languege 
