Last Epoch: How to Defeat Lagon and Survive the Waves
This guide breaks down Lagon’s mechanics, explains each phase of the fight, and provides tactical advice for every class.
Who Is Lagon?
Lagon is a god in the world of Eterra, worshipped by the sea-dwelling people of the Divine Era. He’s the penultimate boss of the campaign, residing deep in the Temple of Lagon, and his fight is one of the most demanding up to that point.
Fight Overview
Location: Temple of Lagon (Chapter 7)
Level: ~50
Arena: A narrow platform facing Lagon’s massive, immobile form
Phase 1 – The Wave of Devastation
In the first phase, you’re standing on a stone walkway staring at Lagon’s face. He doesn’t move but cycles through several area-wide and targeted attacks:
Key Abilities:
Tidal Wave (Horizontal Sweep): Lagon summons a massive horizontal water beam across the entire platform.
Avoidance Tip: Hug the edges of the arena and dodge just before the wave connects. High movement speed helps here.
Lightning Orbs: Small lightning projectiles drop from the sky, dealing heavy damage on impact.
Avoidance Tip: Watch for shadows on the ground and move away quickly.
Gaze of Lagon (Laser Beam): A deadly laser that sweeps across the platform.
Avoidance Tip: This is telegraphed by a glowing line—use a movement skill (like Teleport, Lunge, Shift) to reposition rapidly.
Wave Spawn Minions: Small tentacle monsters appear periodically.
Strategy: Take them out quickly to avoid getting overwhelmed while dodging Lagon’s AoEs.
Phase 1 Strategy:
Keep moving. Don’t stand still unless casting/channelling a fast skill.
Use movement abilities wisely. Save your dash or teleport for dodging the laser or Tidal Wave.
Positioning is key. Stay mid-range if possible—you’ll have more time to react to AoE cues.
Bring stun/freeze immunity or cleansing tools if your build is vulnerable to crowd control.
Intermission – The Wave of Collapse
After dealing enough damage, Lagon will disappear, and a massive tidal wave washes over the arena. You’ll be thrown into a submerged area, initiating a minion phase.
Enemies:
Tentacle Warriors
Lightning-casting Sirens
Corrupted Sea Beasts
Objective:
Defeat all waves of enemies to trigger Phase 2 of the Lagon fight.
Tips:
Use AoE skills for fast clearing (e.g., Warpath, Static Orb, Spirit Plague).
Summoner builds can shine here—let your minions tank and clean up.
Watch the ground. Lightning patterns and falling debris can interrupt or kill if you’re not careful.
Phase 2 – God of the Depths
After clearing the underwater mobs, you’ll face Lagon again—this time with more aggressive patterns and multiple overlapping attacks.
New or Upgraded Abilities:
Enhanced Gaze: The laser beam now appears more frequently and rotates faster.
Double Wave Attack: Lagon can now chain two horizontal tidal waves, requiring multiple dodges.
Storm Cascade: A barrage of lightning drops in quick succession over a large portion of the arena.
Pro Tip:
Consider cooldown reduction gear or skills for more frequent dodges.
Buff defensive layers: Armor, resistances, and endurance thresholds will greatly increase your survivability.
Recommended Builds and Skills
Primalist (Beastmaster/Shaman):
Use Summon Sabertooth and Fury Leap to stay mobile while minions deal damage.
Ice Thorns auto-cast helps deal with the minions during intermission.
Mage (Spellblade/Sorcerer):
Teleport is essential for dodging lasers.
Fireball + Flame Ward can keep you safe and allow burst damage in short windows.
Rogue (Marksman/Bladedancer):
High mobility shines here—use Shift and Decoy to dodge and reposition.
Multishot or Synchronized Strike can quickly clear mobs in Phase 2.
Acolyte (Lich/Necromancer):
Minion builds can focus on movement while their undead army deals damage.
Aura of Decay + Reaper Form offers life steal and survivability.
General Survival Tips
Stack Movement Speed: You’ll need it to dodge the tidal wave and laser.
Overcap Lightning Resistance: Several of Lagon’s attacks are lightning-based.
Use Potions Strategically: Save them for post-laser or when multiple AoEs overlap.
Avoid Getting Cornered: Always keep space to retreat and reposition.
Rewards for Defeating Lagon
Chapter Progression: Unlock access to the next story zones.
Unique Items: Lagon can drop specific gear and idols.
Experience and Gold: Excellent for leveling around the mid-40s to 50s.
Echo Unlocked: Beating Lagon once adds him as a boss echo in the Monolith of Fate.
Final Thoughts
Defeating Lagon in Last Epoch is a true test of your reaction time, build synergy, and buy Last Epoch Gold awareness. The mix of visual chaos and tactical movement makes this one of the game’s standout fights. But once you learn to read his attack cues and manage the intermission waves efficiently, you’ll not only survive—you’ll dominate.
Whether you’re preparing for Empowered Monoliths or just trying to finish the campaign, learning how to defeat Lagon is a major milestone in your journey through Eterra.
Good luck, traveler—and don’t turn your back on the sea.