Complete Arcane Lineage Boss Guide – How to Beat Them All

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Complete Arcane Lineage Boss Guide – How to Beat Them All

Mar 18,25

In Arcane Lineage, boss battles range from solo-able encounters for new players to incredibly challenging fights requiring multiple coordinated teams. Each boss presents unique mechanics demanding strategic thinking and patience for successful completion. The rewards are well worth the effort, offering some of the game's most coveted loot and items. This guide will equip you to conquer these formidable foes.

Boss	Location	Difficulty
King Slime	Around the City	Easy
Yar’thul, the Blazing Dragon	Inside Mount Thul	Normal
Thorian, the Rotten	Deep in the Cess Grounds	Hard
Mettrom’s Vessel	Deeproot Canopy	Very Hard
Seraphon	Unlocked by ranking up in the Church of Raphion	Hard
Arkhaia	Unlocked by ranking up in the Cult of Thanasius	Very Hard

King Slime

While considered a mini-boss, King Slime shouldn't be underestimated, especially by lower-level players. Note that this boss does not award soul points.

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 locating and defeating the boss. This quest has a 30-minute global server cooldown.

King Slime Fighting Strategy

King Slime has 400 HP (600 HP if Corrupted), the lowest of any boss. Its main attack involves summoning more Slimes, which can overwhelm players if not dealt with promptly. Its AoE poison attacks necessitate potions and cleansing abilities. Focus on eliminating the summoned Slimes before attacking the King Slime directly.

Attacks	Energy Cost	Effect
Slime Creation	1	Summons a Slime.
Crush	0	Attacks a party member.
Poison Eruption	2	Poisons the party (undodgeable).
Scalding Spray	3	Poisons the party (undodgeable).

King Slime Drops and Rewards

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

Yar’thul, the Blazing Dragon

Yar’thul is a fire-type boss utilizing fire and inferno-based attacks. Its resistance to fire and physical damage, coupled with vulnerability to Hex damage, requires strategic party composition.

Yar’thul Location

Yar’thul resides deep within Mount Thul, an active volcano in the desert.

Yar’thul Fighting Strategy

Yar’thul possesses 1200 HP (1800 HP if Corrupted). Many attacks inflict Inferno and Burning, making this a race against time. Phase two, triggered below 50% health, involves summoned meteors inflicting stunning and healing reduction. The Dragon Ring and Pristine-level accessories are highly recommended. The Corrupted version gains lifesteal.

Attacks	Energy Cost	Effect
Inferno	0	Automatic Inferno effect (undodgeable).
Fire Claw	0	Light damage fire attack.
Magma Pillar	2	Magma pillar inflicting Inferno and Burn (lasts 3 turns).
Blaze Core	3	Heals based on consumed Inferno stacks.
Blaze Eruption	2	Damages burning targets, applying Inferno and Burning stacks.
Magma Beam	4	Massive damage beam (undodgeable).
Hellfire	1	AOE damage and Burning stacks (undodgeable).
Armageddon	6	Below 50% HP: Massive damage meteor, stun, healing reduction (undodgeable).

Yar’thul Drops and Rewards

Guaranteed rewards include: 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

Thorian, once an animal, is now a corrupted abomination weak only to Holy damage and slightly to fire.

Thorian Location

Thorian is located deep within the Cess Grounds in the Deeproot Canopy.

Thorian Fighting Strategy

Thorian has 2600 HP (3900 HP if Corrupted). Using the same attack type twice consecutively causes it to heal 150% of the damage dealt. It is highly resistant to all damage types except Holy (135% damage). Below 50% health, it unleashes a devastating attack inflicting Plague, Curse, and Hexed (15-turn cooldown).

Attacks	Energy Cost	Effect
Cursed Wave	2	Damage and Curse chance.
Overflowing Curse	0	Minigame; failure inflicts Plague (undodgeable).
Cess Breath	1	AOE damage and debuffs.
Warped Crush	1	Damage to 3 party members.
Blasphemous Obliteration	5	Below 50% HP: Massive damage, Plague, Curse, Hexed (undodgeable).
Hexed Burst	1	AOE damage and random debuffs.
Plague Rupture	2	Random debuff and massive damage scaling with debuffs.

Thorian Drops and Rewards

Guaranteed rewards include: 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

Metrom’s Vessel, a raid boss, requires a Void Key (obtained from defeating corrupted bosses) and spawns on a global timer.

Metrom’s Vessel Location

Location is announced server-wide upon spawn.

Metrom’s Vessel Fighting Strategy

Metrom’s Vessel boasts 10,000 HP (15,000 HP if Corrupted). This fight is a test of endurance, requiring coordinated team effort and lasting 30-60 minutes. Two phases exist, each with unique wing mechanics and attacks. Strategic debuff application and timing are crucial for success. The first phase involves destroying wings to reduce damage negation, while the second phase introduces offensive and defensive wing modes along with additional minions.

Phase 1 Attacks

Attacks	Energy Cost	Effect
Rendering Slash	0	Damage and Weakness stacks.
Deathbound	1	Sundered stacks on 2 players.
Eclipse	1	Self-buff.
Invoke Shadeblades	3	Summons Shadeblades (undodgeable).
Hexed Rend	3	AOE debuff (undodgeable).
Oblivion	5	50% HP damage, Curse (undodgeable).

Phase 2 Attacks

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Attacks	Energy Cost	Effect
Oblivion + Eclipse	1	Rendering Slash followed by Hexed Rend.
Unyielding Fury	2	AOE Blind and Hexed (undodgeable).