Massive cubes of stone and light, Flux Constructs are some of Hyrule’s strangest enemies-puzzling, powerful, and rewarding. Learn how to spot their weak points, dismantle their towering forms, and put their glowing cores to smart use in your arsenal.
Fortunately, taking this boss down and making use of its dropped items – including the frighteningly powerful Flux Construct core – is actually fairly simple once you figure it out. Also fortunately, we’ve done the dying so you don’t have to.
Where to find Flux Constructs in Tears of the Kingdom
Flux Constructs appear on floating sky islands and deep underground in The Depths, each guarding a specific area. They can be found on the Great Sky Island, in sky archipelagos above Hyrule, and scattered across the Depths, often near Lightroots and buried ruins. A map with all 35 locations marks each one clearly, making it easy to track them down either by exploring the sky or descending into the dark regions below the surface.
The first Flux Construct I you will meet is on the first Sky Island you come across, but is much easier when you have a decent weapon (around 10 attack) and a bow. Ideally, you should also have your fourth heart container and a fresh set of armor. We recommend getting as far as Hyrule Castle, grabbing the paraglider, then teleporting back to Nachoyah Shrine in the south of the Great Sky Island.
From there, head to the location marked below. The paraglider really makes a huge difference here, as you can probably imagine.
Otherwise, you’ll find tons of Flux Construct bosses on both sky islands and in the Depths. You will encounter a ton of them as you look for Sage’s Wills as well.
How to beat the Flux Construct in Tears of the Kingdom
Target the green-glowing block on the Flux Construct’s body, which marks its weak point. Use Ultrahand to grab and shake that block free, scattering the structure into pieces for direct attacks on the exposed core. Repeat the process through its humanoid, flying, and ground forms, striking hard before it reassembles, and watch for the core’s position shifts in tougher variants.
Once you engage the enemy, it will transform into a colossus that will try to pancake you with its fists. Fortunately, if you look closely, you’ll see that one of the blocks is not like the others. Which block it is appears to be random, but it’s pretty easy to spot thanks to its glowing spots.
There are two ways to take down Flux Constructs, targeting their glowing cubes:
- Simply pop that with an arrow and the baddie will take the knee. This gives you the chance to run in and whale on it with your strongest weapon. If you see it starting to get back up, sprint away like your life depends on it. (It does.)
- Use Ultrahand to grab the glowing cube and yank it off. Doing so will make the boss crumble into pieces, allowing you to whack the glowing cube for damage freely.
If the Flux Construct turns into a horizontal platform, just Ascend up and pick one of the above methods to knock it out.
Repeat until the boss falls apart and explodes into sweet, sweet loot.
Notably, the harder iterations of the boss (Flux Construct II and Flux Construct III) work a bit differently.
Flux Construct II boss strategy
Flux Construct II does all the same stuff that its weaker cousin does, but it will float higher in the air when it turns into a horizontal platform. You will need to wait for it to spit out a row of cubes to the ground, get on top of one of the cubes, and use Recall on it to go up to the Flux Construct. You’ll be able to hit or Ultrahand the glowing cube from the top of the platform.
Flux Construct III boss strategy
Flux Construct III does the same as the two above versions, but it will randomly shift the glowing cube around, making it harder to target. However, if you use Ultrahand on the glowing cube and it swaps around, you’ll still have the glowing cube selected. That said, you’ll need to be very quick with grabbing (or hitting) the correct cube before it shifts around.
How to use the Flux Construct core
After defeating a Flux Construct, you can collect its core, which can be attached to weapons, shields, or vehicles using Ultrahand. Attaching the core greatly boosts the item’s attack or defense power, depending on what it’s fused with. You can also use the core as a power source for Zonai devices, providing strong and lasting energy. Keep in mind that these cores are rare, so save them for powerful builds or important battles where the extra strength makes a real difference.
Flux Constructs drop Flux Construct cores, with its number depending on which iteration of the boss that dropped it. You can’t pick this item up, but you can attach it to a weapon to give it a massive damage spike.
Simply put, equip a weapon that hasn’t been Fused yet (we used a Zonaite sword for the flavor win), use the Fuse ability to create a terrifying looking weapon. The attack power of our sword jumped from 6 to 19 when adding a Flux Construct I core, meaning this more than tripled its attack power with 13 attack. Adding a Flux Construct II core to a mighty Zonaite spear gave it 20 attack and adding a Flux Construct III core to a mighty Zonaite sword gave it 32 attack.
Best weapons and fusions for damaging Flux Constructs
Best weapons and fusions excel by targeting the Flux Construct’s glowing core after stunning it with arrows or Ultrahand, maximizing melee damage during openings.
Top Arrow Fusions
Arrows stun the core block quickly, creating safe attack windows. Bomb Flower Arrows explode on impact
Which Flux Core level gives the biggest damage boost
Flux Construct III cores provide the biggest damage boost when fused to weapons in The Legend of Zelda: Tears of the Kingdom. They add up to +32 attack power, far surpassing the +13 from Flux Construct I cores or intermediate boosts from Flux Construct II.
Core Comparison
| Core Type | Damage Boost | Typical Weapon Example |
|---|---|---|
| Flux Construct I | +13 | Zonaite Sword (6 → 19) |
| Flux Construct II | +20-25 | Zonite Spear (base → higher) |
| Flux Construct III | +32 | Mighty Zonite Sword (max output) |
Acquisition Tips
Defeat higher-level Flux Constructs in sky islands or shrines for Tier III cores, which also grant spinning mace effects on hit for extra core-shredding damage. Fuse to high-base weapons like Royal Claymores for optimal results against tougher enemies.
