Arcane Lineage Boss Guide: Strategies for Victory

Bosses in Arcane Lineage range from novice-friendly foes to formidable adversaries requiring coordinated teams. Each presents unique mechanics, demanding strategic planning and patience to conquer. Triumph yields top-tier loot and items. Follow our Arcane Lineage boss guide to master these challenges.

Recommended Videos

Table of Contents

Arcane Lineage Boss ListKing SlimeKing Slime LocationKing Slime Fighting StrategyKing Slime Drops and RewardsYar’thul, the Blazing DragonYar’thul LocationYar’thul Fighting StrategyYar’thul Drops and RewardsThorian, the RottenThorian LocationThorian Fighting StrategyThorian Drops and RewardsMetrom’s VesselMetrom’s Vessel LocationMetrom’s Vessel Fighting StrategyMetrom’s Vessel Drops and RewardsArkhaia and Seraphon

Arcane Lineage Boss List

Boss	Location	Difficulty
King Slime	Near the City	Easy
Yar’thul, the Blazing Dragon	Within Mount Thul	Normal
Thorian, the Rotten	Cess Grounds Depths	Hard
Metrom’s Vessel	Deeproot Canopy	Very Hard
Seraphon	Unlocked via Church of Raphion Rank	Hard
Arkhaia	Unlocked via Cult of Thanasius Rank	Very Hard

King Slime

This foe is more of a minor challenge compared to other Bosses in Arcane Lineage. Novices should remain cautious, as it can still overpower low-level players. Note that this boss does not yield soul points.

King Slime Location

King Slime appears after 100 Slimes are defeated on the server, spawning near the city closest to the last slain Slime. A notification on the Quest Board signals the active King Slime quest, which includes two steps:

Find the King Slime Kill the King Slime

This quest has a 30-minute server-wide cooldown.

King Slime Fighting Strategy

With 400 HP (600 HP if Corrupted), King Slime has the lowest health among Arcane Lineage Bosses. Its primary tactic is summoning additional Slimes, which can overwhelm unprepared teams. It also unleashes AOE poison attacks, so equip potions and cleansing skills. Its low health makes for a straightforward fight. Clear the summoned Slimes to focus attacks and defeat it swiftly. Its AOE attacks inflict Poison but deal no direct damage, allowing room for offensive strategies.

Attacks	Energy Cost	Effect
Slime Creation	1	Summons a Slime to aid King Slime.
Crush	0	King Slime lunges, striking a party member.
Poison Eruption	2	King Slime releases acid, poisoning the party. Undodgeable and unblockable.
Scalding Spray	3	King Slime spews boiling liquid, poisoning the party. Undodgeable.

King Slime Drops and Rewards

Defeating King Slime yields these potential drops:

Random Tier 1 Equipment Slime Buckler Gelat Ring

Completing the King Slime event via the Quest Board may reward:

Ferrus Skin Potion Small Health Potion Essence Gold

Yar’thul, the Blazing Dragon

This fire-based boss employs Fire and Inferno attacks, inflicting Burning and Inferno stacks. Unprepared parties face a tough battle. Yar’thul resists fire and physical damage but is vulnerable to Hex damage.

Yar’thul Location

To locate Yar’thul in Arcane Lineage, venture deep into the Desert to find Mount Thul, a volcano forged by Yar’thul’s heat. Navigate its dark corridors to confront the Blazing Dragon at the summit.

Yar’thul Fighting Strategy

With 1200 HP (1800 HP if Corrupted), this dragon compensates for lower health with high damage output. Its attacks inflict Inferno and Burning effects, making speed critical to avoid being overwhelmed. Below 50% health, it enters a second phase, summoning meteors that stun and reduce healing. End the fight quickly to counter this. Equip Dragon Ring and Pristine accessories for an edge. The Corrupted version gains lifesteal.

Attacks	Energy Cost	Effect
Inferno	0	Activates at battle start, inflicting Inferno status on the party. Undodgeable and unblockable.
Fire Claw	0	Yar’thul slashes with fiery claws, dealing light damage.
Magma Pillar	2	Yar’thul creates a magma pillar, damaging attackers and applying 2 Inferno and 5 Burn stacks for 3 turns.
Blaze Core	3	Yar’thul consumes party Inferno stacks to heal.
Blaze Eruption	2	Yar’thul slams the ground, amplifying damage to burning targets with scaling Inferno and Burning stacks.
Magma Beam	4	Yar’thul charges a fire beam for 1 turn, then unleashes massive damage to adjacent units. Undodgeable and unblockable.
Hellfire	1	Yar’thul releases a fire wave, lightly damaging the party and applying 9 Burning stacks. Undodgeable and unblockable.
Armageddon	6	Below 50% health, Yar’thul may summon a meteor, dealing massive damage, applying healing reduction, and potentially stunning. Usable multiple times, undodgeable, and unblockable.

Yar’thul Drops and Rewards

Defeating Yar’thul guarantees these rewards:

Absolute Radiance Permafrost Curse Wild Impulse Heavenly Prayer Breath of Fungyir Narhana’s Sigil Reality Watch Shifting Hourglass Ring of the Dragon The Void Key (Corrupted Yar’thul)

Possible drops include:

Dragontooth Blade Dragonbone Gauntlets Dragonbone Spear Dragonflame Shield Memory Fragment Soul Dust Phoenix Tear Resplendant Essence Lineage Shard Skyward Totem

Thorian, the Rotten

Once a creature of the Deeproot Canopy, Thorian is now a corrupted, tentacled horror with glowing red eyes, cursing all who approach. It resists most elements but is highly vulnerable to Holy damage.

Thorian Location

Find Thorian in the deepest parts of the Cess Grounds within the Deeproot Canopy. From the entrance, head right and continue straight. Its massive, grotesque form is unmistakable.

Thorian Fighting Strategy

Boasting 2,600 HP (3,900 HP if Corrupted), Thorian presents a complex challenge. Its passive negation heals 150% of damage if the same attack type is used consecutively, requiring varied attack strategies. It resists most damage types except Holy, which deals 135% damage, and slightly Fire (10% boost). Below 50% health, it unleashes a devastating attack, inflicting Plague, Curse, and Hexed with a 15-turn cooldown, rarely repeating.

At half health, Thorian unleashes a powerful attack, applying Plague, Curse, and Hexed. With a 15-turn cooldown, it’s unlikely to recur. Resume normal tactics post-attack.

Attacks	Energy Cost	Effect
Cursed Wave	2	Thorian strikes three party members, potentially inflicting Curse.
Overflowing Curse	0	Initiates a minigame; failure inflicts Plague. Undodgeable and unblockable.
Cess Breath	1	Thorian releases rotten air, dealing AOE damage and debuffing the party.
Warped Crush	1	Thorian charges, damaging three party members.
Blasphemous Obliteration	5	Below 50% health, Thorian rages, devastating the party with 1 Plague, 3 Curse, and 1 Hexed stack. Undodgeable and unblockable.
Hexed Burst	1	Thorian emits an AOE wave, damaging and applying random debuffs (1 Hexed or 3 Curse).
Plague Rupture	2	Thorian applies a random debuff, then ruptures a party member, dealing massive damage based on debuff count.

Thorian Drops and Rewards

Defeating Thorian guarantees these rewards:

Absolute Radiance Permafrost Curse Wild Impulse Heavenly Prayer Breath of Fungyir Stellian Core Metrom’s Amulet Darksigil Ring of Blight The Void Key (Corrupted Thorian)

Possible drops include:

Blightrock Dagger Blightwood Staff Memory Fragment Soul Dust Phoenix Tear Resplendant Essence Lineage Shard Skyward Totem

Metrom’s Vessel

Once a noble hero, Metrom’s Vessel is now a hollow shell possessed by Metrom. Sealed in a Temporal Jail after attempting vengeance, its power is diminished but still formidable.

Metrom’s Vessel Location

Unlike other Bosses, Metrom’s Vessel is a Raid Boss spawning on a global timer. Access requires a Void Key, earned by defeating Corrupted versions of prior bosses. Await the server-wide alert for its spawn location.

Metrom’s Vessel Fighting Strategy

A true titan, Metrom’s Vessel boasts 10,000 HP (15,000 if Corrupted) and massive damage negation, requiring 30–60 minutes to defeat. Its two-phase fight features varied moves, high damage, and complex mechanics.

In phase one, black wings grant significant damage negation. Apply status effects and debuffs to destroy them, but time this carefully—removing all wings early unlocks phase two attacks, increasing difficulty. Fewer wings boost its damage output.

Metrom’s Vessel summons Shadeblades, fragile minions with 200 HP that deal heavy damage. Eliminate them quickly. Prolonging phase one risks Oblivion, an undodgeable attack dealing 50% max HP to all.

In phase two, Metrom’s Vessel collapses, shattering the Temporal Jail. Its wings shift to Offensive mode, increasing damage and minion strength, or Defensive mode, granting resistance and Thorns Aura to reflect damage. Destroy wings with status effects. A Mini Shadebringer attacks whenever a dodge fails, adding pressure.

Victory demands team coordination, persistent debuffs, and damage mitigation. Mastering wing mechanics and timings eases the grueling attrition battle against its massive health pool.

Phase 1 Attacks

Attacks	Energy Cost	Effect
Rendering Slash	0	Metrom’s Vessel lunges, damaging a player and applying 3 Weakness stacks.
Deathbound	1	Metrom’s Vessel applies 3 Sundered stacks to two random players.
Eclipse	1	Metrom’s Vessel buffs itself.
Invoke Shadeblades	3	Metrom’s Vessel summons two 200 HP Shadeblades. Undodgeable and unblockable.
Hexed Rend	3	An undodgeable AOE slash debuffing all players. Undodgeable and unblockable.
Oblivion	5	Metrom’s Vessel casts ancient magic, dealing 50% HP damage and inflicting Curse. Undodgeable and unblockable.

Phase 2 Attacks

Attacks	Energy Cost	Effect
Oblivion + Eclipse	1	Metrom’s Vessel combines Rendering Slash (P1) with Hexed Rend (P1).
Unyielding Fury	2	An AOE debuff applying 3 Blind and 2 Hexed stacks to all players. Undodgeable and unblockable.
Minishade Bringer	3	Metrom’s Vessel launches three Shadebringers. Undodgeable and unblockable.
Shadebringer	1	Metrom’s Vessel slashes three Shadebringers, hitting all players and applying 4 Cursed stacks. Undodgeable and unblockable.
Blackout	2	Metrom’s Vessel debuffs the entire party. Undodgeable and unblockable.

Metrom’s Vessel Drops and Rewards

Defeating Metrom’s Vessel guarantees these rewards:

Metrom’s Grasp Chaos Orb Expedite Anklet Echo Shard Tempurus Gem Arcanium Crystal

Possible drops include:

Darkblood Staff Darkblood Dagger Darkblood Spear Darkblood Hexer Darkblood Sword Darkblood Cestus

Arkhaia and Seraphon

Details on Arkhaia and Seraphon are scarce due to their rarity. These challenging bosses feature complex mechanics, unsuitable for beginners, even with strong teams. They represent the game’s ultimate challenges.

Unlock Arkhaia by reaching rank 20 in the Cult of Thanasius. With 7,000 HP, its damage-over-time mechanics are tricky. Victory allows starting a new character with the rare Inferion race.

Unlock Seraphon at rank 20 in the Church of Raphion. With 4,500 HP, defeating it grants the option to start a new character with the rare Sheea race in Arcane Lineage.

That concludes our Arcane Lineage boss guide. Want to grow stronger? Explore our comprehensive Arcane Lineage class tier list and guide.