Getting Started First, level the skill tree that you want Abyssal mode on, to level 55.
Then, talk to Belstrom in Diamond Shores. He is at the northwestern area as shown on the map below. He will set you on a questline to speak to various NPCs at different locations.
1. A Darker Power
Belstrom will send you to Wanderer Arde in Karkasse Ridgelands. If you do not have a portal to get there, there is a portal gate at the top of Veroe in Hasla.
Wanderer Arde will ask us to speak with Silent Watcher located in the location Golden Ruins
2.A Twisting Path
The Silent Watcher will send you to ApprenticeRudal in Exeloch. If you do not have the portal, you can go to the Dungeon tab in your teleport book and port to Serpentis.
After dialogue with ApprenticeRudal we will need to return to Golden Ruins and find there Scout Captain Camaro
3.Whispers from the Abyss
After talking with ApprenticeRudal we set off Diemond Shores and talk with Drillmaster Rhiona
Next, we set off to Ynys Island to talk there with Maynard
4.Orchidna's Tale
Maynard will ask us to talk Lucius Quinto he is further down the road
5.The Demon Queen
After talking with Lucius Quinto we have a quest item Orchidna Teleport Scroll using which we appear in Queen's Chamber Talk to Damian
We give him a quest and get the opportunity to take threetasks from three different swords, which ones depend on the skill tree of your class.
To complete the quest you will need 12 Abyssal Crystal
as soon as all the conditions of the assignment are fulfilled, you can start level up your Abyssal Skill
Immediately please note that only one branch can be involved at a time Abyssal Skill but you can open and upgrade all the skill tree and at the same time, you don’t have to complete the quest chain. Simply repeat the steps with the sword for each of the branches (select a sword and spend 12 "Abyssal Crystal ")
Also, for level up each skill tree , you will need certain resources:
Passives in Abyssal Skills all regenerate one Abyssal Charge for the skill used. These are the Abyssal Skills available for each main skillset.
Archery:
Serpent's Sight: Mana: 138 Abyssal Points: 2 Range: Caster Effect Range: Caster Cast Time: .9 seconds Cooldown: 10 seconds
Enhances your archery with Abyssal magic, transforming your attacks and gaining unparalleled range.
Increases the base range of bow skills to 30m, but prevents movement. Replaces Endless Arrows with the slower but more powerful Fang Bolt (312% ranged attack!) for the duration.
Lasts 5 seconds, or until the caster takes damage. Duration is reset with each successful Range Attack.
When Abyssal Archery reaches lv40, this skill improves. *Increases Fang Bolt damage.
Acquired at level 10 Hunting Pack: Mana: 78 Abyssal Points: 4-6 Range: Caster Effect Range: Caster Cast Time: Instant Cooldown: 12 seconds
Summons a pack of spectral Snowlions to charge through your enemies, dealing damage and launching them into the air.
No target required, shoots straight forward from the caster and ignores terrain. Any additional charges are consumed on casting, increasing the damage and number of snowlions. (Note: additional Snowlions increase the AoE.)
If cast using 6 Abyssal Charges, enemies launched by this skill are temporarily prevented from using skills.
Acquired at level 55. Hateful Hunter (Passive): Charged Bolt, Piercing Shot, Concussive Arrow, Missile Rain, and Snipe regenerate Abyssal points.
Acquired at level 10
Auramancy:
Crushing Grip: Mana: 59 Abyssal Points: 3 Range: 0-12m Effect Range: 8m Cast Time: Instant Cooldown: 24 seconds
Creates a powerful gravity vortex around the chosen target after a short delay, damaging all enemies within a 10m radius and pulling them towards the target.
When Abyssal Auramancy reaches lv40, this skill improves. *Increases skill damage, and expands the radius from 10m->15m.
Rank 1 acquired at level 10. Rank 2 acquired at level 40. Abyssal Wave: Mana: 78 Abyssal Points: 4-6 Range: Caster Effect Range: Caster Cast Time: 4 seconds Cooldown: 14 seconds
Shoots a wave of force up to 20m in front of you, dealing magic damage and knocking back enemies it touches.
If cast using 6 Abyssal Charges, this skill fires 3 waves back to back. Hitting the same target with multiple waves inflicts a slow effect, decreasing move speed -90% and recovering over 4sec.
Acquired at level 55 Merciless Manipulator (Passive): Comet’s Boon, Conversion Shield, Vicious Implosion, Shrug It Off and Liberation regenerate Abyssal Points.
Battlerage:
Soulbound Blades: Mana: 19 Abyssal Points: 2 Range: 0-12m Effective Range: N/A Cast Time: Instant Cooldown: 4 seconds
Throws otherworldly blades that surround the target for the duration, inflicting damage to it and all nearby enemies.
When Abyssal Battlerage reaches lv40, this skill improves. Skill damage increases, and each successful hit will now inflict -50 to the target’s Defense for a short time. This effect stacks.
Rank 1 is acquired at level 10. Rank 2 is acquired at level 40. Swordfall: Mana: 78 Abyssal Points: 4-6 Range: Caster Effect Range: 8m Cast Time: 4 seconds Cooldown: 14 seconds
Summons a sword from the abyss and hits a target in front of you, dealing Physical Damage.
Can be cast again immediately.
If six Abyssal Points are used to activate the skill, the range of the attack is shortened but strengthened, which is dependent on the cast time of the skill.
Acquired at level 55. Raging Berserker (Passive): Charge, Whirlwind Slash, , Precision Strike, Tiger Strike, and Behind Enemy Lines regenerate Abyssal Points.
Acquired at level 10.
Defense:
Shield Throw: Mana: 19 Abyssal Points: 2 Range: 0-10 m Effect Range: N/A Cast Time: .5 seconds Cooldown: 22 seconds
Hurls your shield at a target, dealing physical damage with a 100% chance to Critical Strike. Temporarily removes all benefits from your shield while projectile is in the air. If the enemy parries this attack, they become Disarmed, losing all functionality and benefits from their weapon for 6sec.
When Abyssal Defense reaches lv40, this skill improves. Skill damage increases, and the shield now bounces to up to 3 nearby targets after impact, for a total of 4 possible targets per cast.
Rank 1 is acquired at level 10. Rank 2 is acquired at level 40. Cruel Binding: Mana: 78 Abyssal Points: 4-6 Range: 0-4m Effect Range: N/A Cast Time: 0.2 seconds Cooldown: 24 seconds
Tethers an enemy to a location for 4sec, pulling them back whenever they move 10m from that spot. Any additional charges are consumed on casting, increasing the duration up to a maximum of 10sec.
Acquired at level 55. Indomitable Rage (Passive): Shield Slam, Bull Rush, Revitalizing Cheer, Mocking Howl, and Boastful Roar regenerate Abyssal Points.
Acquired at level 10.
Occultism:
Cursed Thorns: Mana: 19 Abyssal Points: 2 Range: Caster Effect Range: 0-20m Cast Time: 0.9 seconds Cooldown: 12 seconds
Inflicts an enemy with cursed seeds, causing deadly thorns to sprout in their footsteps.
Single target debuff. Lasts for 9sec, causing the target to leave a dark trail behind them that bursts into small AoE thorns after 4 seconds. The Cursed Thorns deal damage to all nearby enemies when they appear, and then continue to slow and damage any enemies that stay within their AoE. (Note: Functions kind of like a painful, offensive Frigid Tracks. Except instead of freezing enemies it damages and slows them.)
Rank 1 acquired at level 10. Rank 2 acquired at level 40. Shadow Circle: Mana: 78 Abyssal Points: 4-6 Range: 0-50m Effect Range: 30m Cast Time: 0.8 seconds Cooldown: 20 seconds
Summons a circle of dark magic to surround the battlefield, allowing the caster to teleport to any target within the circle at will.
Summons a 30m radius circle around the target area for 20sec, and grants the caster four stacks of Circle Step. For the duration of this spell, the caster may use Circle Step to teleport up to 30m to appear directly in front of any target within the circle.
If cast using 6 Abyssal Charges, the caster may use Circle Step an unlimited number of times for the duration of the spell.
Acquired at level 55. Gleeful Destruction (Passive): Mana Stars, Hell Spear, Absorb Lifeforce, Summon Crows, and Crippling Mire regenerate Abyssal Points.
Acquired at level 10.
Venom Blades: Mana: 19 Abyssal Points: 2 Range: N/A Effect Range: Target Cast Time: Instant Cooldown: 14 seconds
Throws venomous knives at all enemies within a 5m radius around the caster.
Inflicts initial Physical Damage to all targets (based on Melee Attack), then applies a poison debuff for Magic Damage over time (based on Magic Attack). This effect ignores Magic Defense.
When Abyssal Shadowplay reaches lv40, this skill improves. Skill damage increases, and the range is increased to a 10m radius.
Rank 1 acquired at level 10. Rank 2 acquired at level 40. Assassination: Mana: 78 Abyssal Points: 4-6 Range: N/A Effect Range: Target CastTime: Instant Cooldown: 10 seconds
Can only be cast while stealthed. Increases Shadowplay Skill Damage +12% for 4sec, and causes the caster to become impossible to target during that time.
Any additional charges are consumed on casting, increasing the duration up to a total of 8sec.
Acquired at level 55 Murderous Intent (Passive): Wallop, Stalker’s Mark, Shadowsmite, Toxic Shock and Throw Dagger regenerate Abyssal points.
Acquired at level 10
Songcraft:
Abyssal Echoes: Mana: 59 Abyssal Points: 3 Range: Caster Effect Range: Caster CastTime: Instant Cooldown: 16 seconds
Ends all currently-active Perform skills, but creates lesser echoes of those abilities that continue on their own for up to 10 seconds. These echoes only affect the caster, and are not interrupted by casting non-perform skills. Using additional perform skills during this time will end the echoes early.
When Abyssal Songcraft reaches lv40, this skill improves. Echoes now have the same effect as regular Songcraft songs.
Rank 1 acquired at level 10. Rank 2 acquired at level 40. Polymorphic Resonance: Mana: 78 Abyssal Points: 2 Range: Caster
EffectRange: Target Cast Time: Instant Cooldown: 30 seconds
Grants temporary immortality to allies within 15m.
When subjected to fatal damage, affected allies instead transform into animals and recover a small amount of health. *Polymorphed characters are immune to debuffs for the duration, but can still take damage. This skill has a base duration of 3sec, and any additional charges are consumed over time to extend the duration by 3 seconds each.
If cast while at 6 Abyssal Charges, the base duration is 5sec and additional charges extend the duration by 5sec each.
Using any other ability will end the effect early.
Acquired at level 55. Seething Songs (Passive): Startling Strain, Dissonance, Rhythmic Renewal, Healing Hymn, and Alarm Call regenerate Abyssal points.
Acquired at level 10.
Sorcery:
Void Leap: Mana: 59 AbyssalPoints: 1 Range: Caster Effect Range: N/A Cast Time: Instant Cooldown: None
Teleports the caster to a random location 5-10m away.
No cooldown. Each teleport costs another Abyssal Charge. Can’t be used while Snared.
When Abyssal Sorcery reaches lv40, this skill improves. Teleport distance increases to 5-15m.
Rank 1 acquired at level 10. Rank 2 acquired at level 40. Serpent Strike: Mana: 78 Abyssal Points: 4-6 Range: 0-20m Effect Range: None Cast Time: 4.6 seconds Cooldown: 22 seconds
Summons a magical serpent that burrows underground, erupting beneath the target.
Channeling skill, which can be stopped/completed early at any time by using the skill again during channeling. Requires 4 Abyssal Charges to begin channeling, but can be cast using 1 to 6 Abyssal Charges once channeling begins, increasing the damage dealt with each additional charge used.
Acquired at level 55. Wrathful Casting (Passive): Freezing Arrow, Arc Lightning, Searing Rain, Chain Lightning, and Meteor Strike regenerate Abyssal Points.
Acquired at level 10.
Vitalism:
Abyssal Petrification: Mana: 19 Abyssal Points: 3 Range: 0-12m Effect Range: N/A Cast Time: 1.9 seconds Cooldown: 24 seconds
Removes all debuffs and aggro from the target and protects them from all incoming damage, but prevents them from moving or taking actions for 9sec. This effect is canceled if cast again on the same target.
When Abyssal Vitalism reaches lv40, this skill improves. *Duration increases from 9sec->18sec.
Rank 1 acquired at level 10. Rank 2 acquired at level 40. Soul Exchange: Mana: 78 Abyssal Points: 4-6 Range: 0-4m Effect Range: 6m Cast Time: 2.8 seconds Cooldown: 30 seconds
Revives up to 6 allies within 6m of the caster. Allies must be in the same party or raid as the caster to be revived. Any additional charges are consumed on casting, increasing the health and mana of revived targets.
Allies revived in this way cannot benefit from this skill again for 10min.
If cast using 6 Abyssal Charges, the radius increases from 6m-20m.
Acquired at level 55 Profane Prayers (Passive): Antithesis, Mirror Light, Mend, Fervent Healing, and Infuse regenerate Abyssal points.
Acquired at level 10.
Witchcraft:
Devour Hope: Mana: 19 Abyssal Points: 2 Range: 0-20m Effect Range: N/A Cast Time: 1 second Cooldown: 14 seconds
Inflicts crippling despair on your chosen victim.
Single target debuff which lasts 5sec. Any skills used while under the effects of this debuff will receive +10sec to their cooldowns.
When Abyssal Witchcraft reaches lv40, this skill improves. Increases cooldown delay to +15sec. (Please note: this effect works on skills that normally have NO cooldown. Hello 15sec cooldown Triple Slash.)
Rank one is acquired at level 10. Rank 2 is acquired at level 40. Stonesight: Mana: 78 Abyssal Points: 4-6 Range: Caster Effect Range: 15m Cast Time: 1 second Cooldown: 22 seconds
Unleashes the gaze of the terrifying Gorgon, petrifying all enemies facing the caster within a 15m cone.
Channeling skill, with a directional cone effect visible on the ground for easy targeting. Once petrified, enemies remain so until the spell ends or they are no longer in the cone. Any additional charges are consumed on casting, increasing the range of the skill.
Acquired at level 55 Spiteful Curses (Passive): Earthen Grip, Bubble Trap, Insidious Whisper, Banshee Wail and Focal Concussion regenerate Abyssal Points.
Wanderer Arde will ask us to speak with Silent Watcher located in the location Golden Ruins
After dialogue with Apprentice Rudal we will need to return to Golden Ruins and find there Scout Captain Camaro 
Next, we set off to Ynys Island to talk there with Maynard 
We give him a quest and get the opportunity to take three tasks from three different swords, which ones depend on the skill tree of your class.
as soon as all the conditions of the assignment are fulfilled, you can start level up your Abyssal Skill