Arcane Lineage Bosses: Ultimate Defeat Guide

Author : Adam Apr 08,2025

In the world of Arcane Lineage, bosses present a spectrum of challenges, ranging from those that novice players can tackle solo to formidable foes that demand the coordination of multiple teams. Each boss offers a unique set of mechanics, requiring players to employ strategy and patience to overcome them. Successfully defeating these bosses rewards players with some of the game's most coveted loot and items. Let's dive into our comprehensive Arcane Lineage Boss guide to equip you with the knowledge needed to face these thrilling encounters.

Arcane Lineage Boss List

King Slime

Considered more of a mini-boss, King Slime is less threatening than other bosses in Arcane Lineage. However, it remains a challenge for low-level players and does not yield soul points upon defeat.

King Slime Location

King Slime spawns after 100 Slimes are killed on the server. It appears around the city closest to the last slain slime, with a notice on the Quest Board alerting players to the active King Slime quest. The quest involves two steps: finding and then defeating the King Slime. Note that this quest has a 30-minute global cooldown on the server.

King Slime Fighting Strategy

With a modest 400 HP (600 if Corrupted), King Slime has the lowest HP among bosses. Its primary tactic involves summoning additional Slimes to overwhelm your party. Additionally, it employs AOE poison attacks, necessitating the use of potions and cleansing abilities. After dealing with the summoned Slimes, players can quickly defeat King Slime with a few rounds of attacks, as its AOE attacks only inflict poison without causing direct damage.

King Slime Drops and Rewards

Upon defeating King Slime, players can expect these drops:

  • Random Tier 1 Equipment
  • Slime Buckler
  • Gelat Ring

Completing the King Slime quest from the Quest Board may also yield these rewards:

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

Yar’thul, the Blazing Dragon

A formidable fire-type boss, Yar’thul utilizes Fire and Inferno-based attacks, making the fight challenging without proper preparation. It's resistant to fire and physical damage but vulnerable to Hex damage.

Yar’thul Location

To encounter Yar’thul, journey deep into the Desert to reach Mount Thul, an active volcano formed by Yar’thul's intense heat. Navigate the dark corridors within to confront the Blazing Dragon.

Yar’thul Fighting Strategy

Boasting 1200 HP (1800 if Corrupted), Yar’thul compensates for its lower health with powerful attacks that inflict Inferno and Burning effects. The battle becomes a race against time to defeat the dragon before succumbing to its flames. Upon reaching 50% health, Yar’thul enters a second phase, summoning meteors that can stun the party and reduce healing. Employing Dragon Ring and at least Pristine-level accessories can ease this battle. 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 (if 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 an animal dwelling in Deeproot Canopy, Thorian has transformed into a corrupted abomination with multiple red eyes and tentacles. Resistant to most elements, it's particularly vulnerable to Holy damage.

Thorian Location

Find Thorian in the farthest reaches of the Cess Grounds within Deeproot Canopy. Head to the right upon entering the Cess Grounds to encounter this towering enemy.

Thorian Fighting Strategy

With 2,600 HP (3,900 if Corrupted), Thorian presents a complex battle. It heals 150% of damage dealt if hit twice consecutively with the same attack type, necessitating varied attack strategies. Resistant to nearly all damage types except Holy, which deals 135% damage, and slightly weak to fire, Thorian requires strategic planning. Below 50% health, it unleashes a devastating attack, applying Plague, Curse, and Hexed.

Thorian Drops and Rewards

Defeating Thorian guarantees:

  • Absolute Radiance
  • Permafrost Curse
  • Wild Impulse
  • Heavenly Prayer
  • Breath of Fungyir
  • Stellian Core
  • Metrom’s Amulet
  • Darksigil
  • Ring of Blight
  • The Void Key (if 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 hero, Metrom’s Vessel is now a vessel for Metrom, sealed within a Temporal Jail that weakens him. A Raid Boss, its appearance is on a global timer and requires a Void Key to enter the fight, obtainable from defeating corrupted versions of other bosses.

Metrom’s Vessel Location

Metrom’s Vessel spawns on a server-wide timer, with its location announced to all players. A Void Key is needed to participate in the fight.

Metrom’s Vessel Fighting Strategy

With a staggering 10,000 HP (15,000 if Corrupted), Metrom’s Vessel is a true test of endurance. It has two phases with distinct mechanics. In the first phase, its black wings grant damage negation; destroying them increases its damage output. It also summons Shadeblades. The second phase involves wings switching between Offensive and Defensive modes, altering its damage output and resistance. Coordination and constant application of debuffs are key to victory.

Metrom’s Vessel Drops and Rewards

Guaranteed rewards upon 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

These rare bosses are among the most challenging in Arcane Lineage, requiring players to reach rank 20 in specific factions to unlock them. Arkhaia, unlocked through the Cult of Thanasius, has 7,000 HP and a damage-over-time mechanic. Defeating it offers the choice to start a new character as the Inferion race. Seraphon, unlocked through the Church of Raphion, has 4,500 HP. Defeating it allows starting a new character as the Sheea race.

Conclusion

This Arcane Lineage Boss guide provides essential insights into preparing for and conquering the game's most challenging encounters. For those looking to further enhance their gameplay, consider exploring our Complete Arcane Lineage Class tier list and guide to become more powerful.