Home News Complete Arcane Lineage Boss Guide – How to Beat Them All

Complete Arcane Lineage Boss Guide – How to Beat Them All

Mar 19,2025 Author: Gabriel

In *Arcane Lineage*, bosses range from solo-able for new players to requiring multiple teams for victory. Each presents unique challenges and mechanics, demanding strategic thinking and patience. Conquering these formidable foes yields some of the game's most coveted loot and items. This *Arcane Lineage* boss guide will prepare you for the battles ahead.

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Table of Contents

  • Arcane Lineage Boss List
  • King Slime
  • Yar’thul, the Blazing Dragon
  • Thorian, the Rotten
  • Metrom’s Vessel
  • Arkhaia and Seraphon

Arcane Lineage Boss List

BossLocationDifficulty
**King Slime**Around the CityEasy
**Yar’thul, the Blazing Dragon**Inside Mount ThulNormal
**Thorian, the Rotten**Deep in the Cess GroundsHard
**Mettrom’s Vessel**Deeproot CanopyVery Hard
**Seraphon**Unlocked by ranking up in the Church of RaphionHard
**Arkhaia**Unlocked by ranking up in the Cult of ThanasiusVery Hard

King Slime

While considered a mini-boss, King Slime shouldn't be underestimated, especially by low-level players. Note that soul points cannot be obtained from this boss.

King Slime Location

King Slime spawns after 100 Slimes are killed on the server. It appears near the city closest to the last slain slime's location. A notice on the Quest Board announces the King Slime quest, which involves finding and killing the boss. This quest has a 30-minute global server cooldown.

King Slime Fighting Strategy

King Slime has 400 HP (600 if Corrupted), the lowest of any boss. Its main attack is summoning more Slimes, which can overwhelm players. It also uses AOE poison attacks. Potions and cleansing abilities are recommended. Its low health allows for a straightforward battle; focus on eliminating the summoned Slimes before attacking the boss directly. Its AOE attacks only inflict poison, not direct damage.

AttacksEnergy CostEffect
**Slime Creation**1Summons a Slime.
**Crush**0Attacks a party member.
**Poison Eruption**2AOE poison attack.
**Scalding Spray**3AOE poison attack.

King Slime Drops and Rewards

Possible drops: Random Tier 1 Equipment, Slime Buckler, Gelat Ring. Quest rewards: Ferrus Skin, Potion, Small Health Potion, Essence, Gold.

Yar’thul, the Blazing Dragon

A fire-type boss utilizing fire and inferno-based attacks. Most attacks inflict Inferno and Burning, making preparation crucial. It resists fire and physical damage, but is weak to Hex damage.

Yar’thul Location

Found deep within the Desert's Mount Thul, an active volcano. Navigate the volcano's interior to find Yar’thul.

Yar’thul Fighting Strategy

Yar’thul has 1200 HP (1800 if Corrupted). Its high damage output makes it a race against time. Below 50% health, it enters a second phase, summoning meteors that inflict stuns and healing reduction. The Dragon Ring and Pristine-level accessories are highly beneficial. The Corrupted version has lifesteal.

AttacksEnergy CostEffect
**Inferno**0Automatic Inferno status effect.
**Fire Claw**0Light damage.
**Magma Pillar**2Magma pillar inflicting Inferno and Burn.
**Blaze Core**3Heals based on consumed Inferno stacks.
**Blaze Eruption**2Damages burning targets, applies Inferno and Burning.
**Magma Beam**4Devastating fire beam.
**Hellfire**1AOE attack inflicting Burning.
**Armageddon**6Summons a meteor inflicting massive damage, stun, and healing reduction.

Yar’thul Drops and Rewards

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

Thorian, the Rotten

Once an animal, Thorian is now a corrupted abomination weak only to Holy damage and slightly to fire. It curses those who touch it.

Thorian Location

Found in the Deeproot Canopy section of the Cess Grounds. Head right upon entering the Cess Grounds.

Thorian Fighting Strategy

Thorian has 2600 HP (3900 if Corrupted). Attacking twice with the same attack type causes it to heal 150% of the damage dealt. Use varied attack types. It resists most damage, but is heavily weak to Holy damage (135% damage). Below 50% health, it unleashes a devastating attack inflicting Plague, Curse, and Hexed (15-turn cooldown).

AttacksEnergy CostEffect
**Cursed Wave**2Damages 3 party members, chance to inflict Curse.
**Overflowing Curse**0Minigame; failure inflicts Plague.
**Cess Breath**1AOE damage and debuffs.
**Warped Crush**1Damages 3 party members.
**Blasphemous Obliteration**5Devastating AOE attack inflicting Plague, Curse, and Hexed.
**Hexed Burst**1AOE damage, chance to apply debuffs.
**Plague Rupture**2Applies a random debuff, then massive damage scaling with debuffs.

Thorian Drops and Rewards

Guaranteed 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: Blightrock Dagger, Blightwood Staff, Memory Fragment, Soul Dust, Phoenix Tear, Resplendant Essence, Lineage Shard, Skyward totem.

Metrom’s Vessel

Metrom’s Vessel, a raid boss, requires a Void Key (obtained from corrupted bosses) and spawns on a global timer. It’s characterized by extremely high health and damage negation.

Metrom’s Vessel Location

Spawns on a server-wide timer after obtaining a Void Key. Location is announced server-wide.

Metrom’s Vessel Fighting Strategy

Metrom’s Vessel has 10,000 HP (15,000 if Corrupted). It has two phases with different mechanics. Phase 1 involves destroying its wings by applying debuffs; fewer wings increase its damage output. It summons Shadeblades (200 HP each). Prolonged fights risk Oblivion (50% max HP damage). Phase 2 involves Offensive and Defensive wing modes. Offensive increases damage, Defensive increases resistance and applies Thorns Aura. Failing to dodge attacks summons a Mini Shadebringer.

Phase 1 Attacks

AttacksEnergy CostEffect
**Rendering Slash**0Damage and Weakness stacks.
**Deathbound**1Applies Sundered stacks to 2 players.
**Eclipse**1Self-buff.
**Invoke Shadeblades**3Summons Shadeblades.
**Hexed Rend**3AOE debuff.
**Oblivion**550% HP damage and Curse.

Phase 2 Attacks

AttacksEnergy CostEffect
**Oblivion + Eclipse**1Rendering Slash
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