Arcane Lineage Bosses: Full Defeat Guide

Author: Savannah May 30,2025

In the world of *Arcane Lineage*, bosses serve as pivotal challenges that push players to their limits, offering unique experiences and valuable rewards. From the relatively manageable King Slime to the daunting Arkhaia and Seraphon, each boss presents distinct difficulties and requires strategic planning to overcome. While some battles demand brute force, others rely on clever tactics and precise execution. Success often grants players access to some of the best loot and items in the game, making each encounter worthwhile.

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Arcane Lineage Boss List
King Slime
King Slime Location
King Slime Fighting Strategy
King Slime Drops and Rewards
Yar’thul, the Blazing Dragon
Yar’thul Location
Yar’thul Fighting Strategy
Yar’thul Drops and Rewards
Thorian, the Rotten
Thorian Location
Thorian Fighting Strategy
Thorian Drops and Rewards
Metrom’s Vessel
Metrom’s Vessel Location
Metrom’s Vessel Fighting Strategy
Metrom’s Vessel Drops and Rewards
Arkhaia and Seraphon

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

We consider this to be more of a mini-boss due to its lower difficulty compared to other bosses in Arcane Lineage. However, low-level players should still exercise caution, as it can still pose a threat. Note that defeating King Slime does not yield soul points.

King Slime Location

King Slime spawns after 100 slimes are killed on the server. It will appear near the city where the last slime was defeated, and a notice will appear on the Quest Board indicating the active King Slime quest. The quest consists of two steps:

  1. Find the King Slime.
  2. Kill the King Slime.

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

King Slime Fighting Strategy

King Slime has 400 HP (600 HP if Corrupted) and the lowest HP total of any boss in Arcane Lineage. Its primary attack involves summoning slimes that can overwhelm your party over time. Additionally, it has several Area-of-Effect (AoE) poison attacks. We recommend bringing potions and cleansing abilities to counteract these effects. Due to its relatively low health, the battle is straightforward. After clearing