PoE 2 Blackjaw, the Remnant - Location, Moveset, and Strategy Guide

Path of Exile 2 (PoE 2) is shaping up to be an action RPG powerhouse, and if you've made it to Act 3, you're in for a real challenge. One of the toughest optional bosses you'll face is Blackjaw, the Remnant. This monstrous foe lurks in the Oubliette, deep within Jiquani's Machinarium. While you can technically skip this fight, defeating Blackjaw will reward you with a permanent Fire Resistance upgrade, which is crucial to your survival.

This guide covers everything you need to know, from Blackjaw's moveset and weaknesses to the best strategies for taking him down. Whether you're looking to tweak your build, avoid getting wrecked, or just farm efficiently, this guide has you covered.

Blackjaw, the Remnant Location

• Region: Act 3

• Zone: Jiquani’s Machinarium (The Oubliette)

• Access Requirement: Use a Soul Core on the Stone Altar to unlock the chamber

Jiquani's Machinarium is one of those areas in PoE 2 where random generation keeps things fresh, but the general layout remains consistent. Blackjaw can be found in an offshoot zone called The Oubliette, which can be accessed with a Soul Core. You'll typically find the entrance across from the Jiquani Sanctum checkpoint.

While this boss is completely optional, the +10% Fire Resistance (The Flame Core) reward makes it well worth the effort, especially since many late game bosses deal heavy Fire damage.

How to Beat Blackjaw, the Remnant

General Strategy

Blackjaw is a heavy-hitting, fire-infused brute that punishes players who stay in front of him. His attacks are slow but devastating, making mobility and positioning key to surviving this fight.

Key Tips:

• Stay behind Blackjaw: Most of his attacks land directly in front of him, so rolling behind him gives you an advantage.

• Dodge roll often: His slam attacks and fire breath can one-shot glass cannon builds if you’re not careful.

• Use cold damage: Blackjaw has high Physical and Fire Resistance, but he’s vulnerable to Cold Damage. Ice-based builds (or cold-infused weapons) will make this fight easier.

• Utilize terrain: Some pillars in the arena can block projectiles. If you’re ranged, use them for cover.

• Beware of Burning Ground: His fire-based moves leave behind patches of Burning Ground, which can whittle down your HP fast.

Blackjaw’s Moveset and Phases

Phase 1 Moves

Move	Description	How to Avoid
Slam Attack	A massive frontal slam that deals huge damage. He can follow up with two additional slams.	Dodge roll sideways or behind him to avoid the shockwave.
Fire Breath	Sweeps flames in an arc from left to right, dealing fire damage and applying ignite.	Run clockwise and roll into him to dodge.
Push Back	A quick shove that knocks players back, dealing minimal damage.	Not a major threat—just reposition.
Upward Slash	A swift melee attack that deals standard damage.	Stay behind him to avoid.

Phase 2 Moves (50% HP Threshold)

Move	Description	How to Avoid
Three Slam Combo	A devastating three-hit slam that tracks the player in a cone pattern.	Stick close to Blackjaw and roll to the side.
Jump Slam	Jumps into the air before slamming down with an AoE shockwave.	Time your dodge roll just before impact.
Flame Cleave	Blackjaw ignites his axe and cleaves everything in front of him.	Stay behind or to the side.
Flame Projectiles	Launches fireballs in multiple directions.	Strafe or use terrain to block them.

Recommended Builds and Gear

Best Damage Types

• Cold Damage (Highly Effective) – Exploit Blackjaw’s weakness to ice-based skills and weapons.

• Lightning Damage (Moderate) – Doesn’t have a specific weakness but works well.

• Fire and Physical (Ineffective) – Avoid using Fire-based builds, as he has high resistance.

Best Builds for Beating Blackjaw

Melee Builds

• Dual Wield Ice Daggers: Use fast cold-infused daggers and stay behind Blackjaw.

• Cold DoT Builds: Skills like Vortex or Cold Snap can chip away his HP over time.

Ranged Builds

• Bow Builds with Frost Arrows: Kiting is effective, and frost damage helps.

• Spellcaster – Freezing Pulse or Ice Spear: Heavy burst damage that can freeze him briefly.

Tanky Builds

• Shield + Frost Hammer: If you’re playing defensively, stack cold resistances and hit when safe.

• Flame Resistance Stacking: Since Blackjaw deals mostly fire damage, a high fire resistance gear set helps significantly.

Blackjaw, the Remnant Overview and Rewards

Boss Information

• Resistances: Physical, Fire

• Weaknesses: Cold

• Damage Types: Physical, Fire

• Debuffs: Ignite, Burning Ground

Rewards for Defeating Blackjaw

Reward	Effect
The Flame Core	Grants +10% to Fire Resistance permanently
Loot Drops	Random PoE 2 currency, gear, and crafting materials

This Fire Resistance buff is crucial for later acts when enemies and bosses start dealing overwhelming fire damage. If you plan on running high-level maps or facing end-game content, this buff is well worth the fight.

Recommended Builds and Additional Guides

If you're looking for more PoE 2 boss guides, check out these in-depth strategies:

• Rathbreaker Guide – Learn how to defeat this formidable enemy.

• Rudja, Dread Engineer Guide – Master the mechanics of this challenging encounter.

• Zicoatl, Warden of the Core Guide – Tackle this powerful boss with confidence.

These guides will help you navigate PoE 2's most difficult fights and optimize your builds accordingly!

Final Thoughts

Blackjaw, the Remnant is a brutal but rewarding fight that will test your positioning, dodging, and damage output. While cold-based builds have the easiest time, any well-prepared player can take him down with patience. Don't skip this one - the Fire Resistance upgrade is worth it.

For those looking to upgrade their gear, be sure to check the PoE 2 currency markets for the best trade deals. A great source is G4MMO, where you can find competitive prices on high-value items.

Now that you know the ins and outs of Blackjaw, the Remnant, get out there and claim your victory!