In Arcane Lineage, boss encounters range from solo-able challenges for new players to incredibly difficult battles requiring coordinated teams. Each boss presents unique 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 equip you for the fight.

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Table of Contents

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

Arcane Lineage Boss List

King Slime

While considered a mini-boss, King Slime is not to be underestimated, especially by low-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 consists of two steps: finding and killing King Slime. 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. It also uses AoE poison attacks. Potions and cleansing abilities are recommended. Its relatively low health makes it a straightforward battle; focus on eliminating the summoned Slimes before attacking King Slime. Its AoE attacks only inflict Poison, not direct damage.

King Slime Drops and Rewards

Possible drops from King Slime include: Random Tier 1 Equipment, Slime Buckler, Gelat Ring. Quest board rewards for completing the King Slime event 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. Most attacks inflict Inferno and Burning, making this a challenging fight requiring preparation. It resists fire and physical damage, but is weak to Hex damage.

Yar’thul Location

Yar’thul resides deep within Mount Thul, an active volcano in the desert. Enter Mount Thul and navigate its corridors to find the Blazing Dragon.

Yar’thul Fighting Strategy

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

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 resistant to most elements but heavily weak to Holy damage.

Thorian Location

Thorian is found in the Deeproot Canopy within the Cess Grounds. Head right upon entering the Cess Grounds.

Thorian Fighting Strategy

Thorian has 2600 HP (3900 HP if Corrupted). A key mechanic involves its passive negation: attacking twice with the same attack type heals it by 150% of the damage dealt. Vary attack types. It resists most damage except Holy (135% damage) and slightly weak to fire (10% damage increase). Below 50% health, it unleashes a devastating attack inflicting Plague, Curse, and Hexed (15-turn cooldown).

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, is a significantly weakened entity sealed within a Temporal Jail. A Void Key (obtained from corrupted bosses) is required to access this fight.

Metrom’s Vessel Location

Metrom’s Vessel spawns on a global timer; a server-wide notification announces its location.

Metrom’s Vessel Fighting Strategy

Metrom’s Vessel has 10,000 HP (15,000 HP if Corrupted). This fight is a prolonged battle of attrition. It has two phases with varying mechanics. Phase 1 involves destroying its wings to reduce damage negation but increasing its damage output. It also summons Shadeblades (200 HP each). Prolonged fights risk Oblivion (50% max HP damage). Phase 2 features wings with Offensive (damage increase) and Defensive (damage resistance, Thorns Aura) modes. A Mini Shadebringer attacks after dodges fail. Team coordination and debuffs/damage reduction are crucial.

Phase 1 Attacks