Arcane Lineage Bosses: Full Defeat Guide

Bosses in Arcane Lineage range from easy enough for beginners to tackle alone to formidable challenges requiring coordinated teams. Each boss presents unique mechanics and challenges, demanding strategic planning and patience to conquer. Defeating these bosses rewards players with some of the game's best loot and items, making them crucial targets for progression. Use our comprehensive Arcane Lineage Boss guide to gear up and prepare for these epic encounters.

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Arcane Lineage Boss List

King Slime

King Slime is more of a mini-boss, posing less of a threat compared to other bosses in Arcane Lineage. However, it can still be challenging for low-level players. Note that defeating this boss does not yield soul points.

King Slime Location

King Slime spawns after 100 Slimes are defeated on the server. It appears around the city nearest to the last slain slime, and a notification on the Quest Board alerts players of the active King Slime quest. The quest involves two steps:

• Find the King Slime
• Kill the King Slime

This quest has a 30-minute global cooldown on the server.

King Slime Fighting Strategy

With 400 HP (600 if Corrupted), King Slime has the lowest health among bosses. Its primary attack involves summoning more Slimes to overwhelm your party. Additionally, it uses AOE poison attacks, so come equipped with potions and cleansing abilities. After dealing with the summoned Slimes, you can defeat King Slime in a few turns. Its AOE attacks only inflict poison without direct damage, leaving room for your attacks.

King Slime Drops and Rewards

Defeating King Slime may yield these drops:

• Random Tier 1 Equipment
• Slime Buckler
• Gelat Ring

Completing the King Slime quest from the Quest Board offers these rewards:

• Ferrus Skin Potion
• Small Health Potion
• Essence
• Gold

Yar’thul, the Blazing Dragon

Yar’thul is a fire-type boss that uses Fire and Inferno-based attacks, inflicting Inferno and Burning stacks on the party. It's resistant to fire and physical damage but weak to Hex damage.

Yar’thul Location

To locate Yar’thul, venture deep into the Desert to find Mount Thul, an active volcano created by Yar’thul’s immense heat. Enter Mount Thul, navigate through its dark corridors, and confront the Blazing Dragon at the end.

Yar’thul Fighting Strategy

With 1200 HP (1800 if Corrupted), Yar’thul compensates for its lack of tankiness with high damage output. Most of its attacks inflict Inferno and Burning effects, making this a race against time. Below 50% health, it enters its second phase, summoning meteors that stun and apply healing reduction. Focus on ending the battle quickly in this phase. The Dragon Ring and Pristine-level accessories can ease this fight. The Corrupted version gains lifesteal.

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 (from 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 was once an animal in the Deeproot Canopy but became corrupted over time. Now a towering abomination with many red eyes and tentacles, it curses anything it touches. It's resistant to most elements but highly susceptible to Holy damage.

Thorian Location

Find Thorian in the Cess Grounds within the Deeproot Canopy. Enter the Cess Grounds and head right to encounter this massive enemy.

Thorian Fighting Strategy

Thorian boasts 2600 HP (3900 if Corrupted). Its passive negates heal 150% of damage dealt if attacked twice in a row with the same type. Thus, vary your attack types, managing energy and cooldowns. It's resistant to most damage except Holy, which does 135% damage, and slightly weak to fire, increasing damage by 10%.

Below 50% health, Thorian unleashes a devastating attack, inflicting Plague, Curse, and Hexed, with a 15-turn cooldown.

Thorian Drops and Rewards

Guaranteed rewards from defeating Thorian include:

• Absolute Radiance
• Permafrost Curse
• Wild Impulse
• Heavenly Prayer
• Breath of Fungyir
• Stellian Core
• Metrom’s Amulet
• Darksigil
• Ring of Blight
• The Void Key (from 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 proud hero, Metrom’s Vessel now serves as a vessel for Metrom, sealed in a Temporal Jail. This raid boss spawns on a global timer and requires a Void Key to enter the fight.

Metrom’s Vessel Location

Metrom’s Vessel is a Raid Boss that spawns on a global timer. Obtain a Void Key by defeating corrupted versions of other bosses. Once you have a Void Key, await the server-wide notification for Metrom’s Vessel to spawn, along with its location.

Metrom’s Vessel Fighting Strategy

With 10,000 HP (15,000 if Corrupted), Metrom’s Vessel is a statpile requiring 30 to 60 minutes to defeat. It has two phases with different moves, mechanics, and high damage output.

In the first phase, its black wings grant significant damage negation. Destroy these wings by applying status effects and debuffs, but be cautious as fewer wings increase its damage output. Timing wing destruction around the phase transition is key.

Metrom’s Vessel also summons Shadeblades, minions with 200 HP that deal considerable damage. Quickly eliminate them to avoid the boss using Oblivion, an undodgeable attack dealing 50% max HP to everyone.

In the second phase, the wings switch between Offensive and Defensive modes. Offensive mode increases damage output and minion damage, while Defensive mode offers high damage resistance and Thorns Aura. Continue applying status effects to destroy the wings. Metrom’s Vessel also sends out Minishade Bringers when players fail to dodge attacks.

Coordination and constant debuff application are crucial for an efficient fight. Mastering the wing mechanics and timing can make this battle more manageable.

Phase 1 Attacks

Phase 2 Attacks

Metrom’s Vessel Drops and Rewards

Guaranteed rewards from defeating Metrom’s Vessel include:

• 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

Currently, little is known about Arkhaia and Seraphon due to their rarity. Both are challenging bosses with complex mechanics, not recommended for beginners even in strong parties. They are the final bosses in the current development stage.

To unlock Arkhaia, reach rank 20 in the Cult of Thanasius. Arkhaia has 7000 HP and a damage-over-time gimmick. Defeating Arkhaia offers the chance to start a new character with the Inferion race, a powerful and rare starting race in Arcane Lineage.

To unlock Seraphon, reach rank 20 in the Church of Raphion. Seraphon has 4500 HP. Defeating Seraphon allows you to start a new character with the Sheea race, another powerful and rare starting race in Arcane Lineage.

And that concludes our Arcane Lineage Boss guide. For more insights on becoming more powerful, check out our complete Arcane Lineage Class tier list and guide.