Flux Construct III

Maren's Tip

Stock up on Hearty meals before boss fights — a single Hearty Durian dish gives full recovery plus bonus hearts. Don't forget to save!

Description

The most dangerous Zonai automaton. Its core is deeply embedded and protected by rapid-reforming cube shells. Even experienced players should approach with caution.

Weakness

Flux Construct III's primary weakness is Glowing core cube — extremely well protected, requires creative extraction.

How to Beat Flux Construct III

1. Flux Construct III is the most dangerous Zonai automaton and a genuine threat even to well-equipped players.
2. Its core is deeply embedded and heavily protected in all three forms, and its attacks hit devastatingly hard.
3. Preparation: Bring your best fused weapons — you need maximum damage per hit because the exposure windows are short.
4. Have plenty of healing items.
5. Recall and Ascend are both essential abilities.
6. Humanoid Form: The core is completely surrounded by cubes with no direct line of sight for Ultrahand in its default posture.
7. You have two options.
8. First, attack the construct aggressively with melee weapons to knock cubes loose and gradually expose the core — this takes time and puts you at risk from its powerful attacks.
9. Second, and more efficiently, wait for the construct to perform its overhead slam attack.
10. During the windup, the cubes shift and briefly expose the core — grab it with Ultrahand during this split-second window.
11. The humanoid form has a new rapid-fire cube projectile attack where it launches individual cubes at you like bullets.
12. These hit hard and are difficult to dodge if you are close.
13. Maintain medium range and use the projectile recovery time to look for core openings.
14. Platform Form: The core is embedded in the center of the platform and surrounded by a ring of protective cubes.
15. Ascend through the platform, then use Ultrahand to systematically pull away the surrounding cubes to expose the core.
16. This takes precious time, and the platform periodically drops cubes to knock you off.
17. Be fast and efficient — grab the core the moment it is exposed.
18. Cube Form: The cube rolls at high speed and actively changes trajectory to intercept you.
19. Its slam attack creates a large shockwave that deals damage even if the cube itself misses.
20. The core is deeply recessed.
21. Wait for the slam attack, then sprint to the core-face immediately during the brief pause after impact.
22. You have roughly two seconds to grab the core before it resumes rolling.
23. Each core exposure gives only three to five seconds of melee time.
24. Expect five to seven cycles to defeat Flux Construct III.

Rewards

• Zonai Charge x10
• Large Zonai Charge x3
• Flux Construct III Core

Shrines in This Region

Collect Lights of Blessing from nearby shrines to unlock additional Heart Containers — essential for surviving this boss fight.

• Daka Shrine — Puzzle · Difficulty 1/5
• Dokabok Shrine — Combat · Difficulty 1/5
• Ekochiu Shrine — Puzzle · Difficulty 2/5
• Ga-ahisas Shrine — Rauru's Blessing · Difficulty 1/5
• Gutoku Shrine — Rauru's Blessing · Difficulty 1/5
• Joku-u Shrine — Puzzle · Difficulty 3/5
• View all 152 shrines →

Related Bosses

• Flame Gleeok — Overworld Boss, Various (Eldin, Hyrule Field), HP 2,500, 4/5
• Frost Gleeok — Overworld Boss, Various (Hebra, Tabantha), HP 2,500, 4/5
• Thunder Gleeok — Overworld Boss, Various (Gerudo, Akkala), HP 2,500, 4/5
• King Gleeok — Overworld Boss, Depths / Rare Surface, HP 4,000, 5/5
• Flux Construct I — Overworld Boss, Sky Islands / Depths, HP 800, 2/5
• Flux Construct II — Overworld Boss, Sky Islands / Depths, HP 1,200, 3/5

Related Guides

• Weapons Database — Find the best weapons for every boss fight
• Temple Walkthroughs — Complete dungeon guides with boss prep
• Armor Sets — Best armor for boss resistances & defense
• Shrine Walkthroughs — All 152 shrine solutions for max hearts