Flux Constructs are Zonai minibosses assembled from large cubes. Only the glowing green core takes damage. Bring a strong Fused weapon and use Ultrahand to expose that core instead of striking the surrounding blocks.
Flux Construct I
Keep your distance as the humanoid form slams its arms down. When the core is in reach, grab it with Ultrahand and shake it free. The body falls apart: run to the loose core and attack before it rebuilds.
When it becomes a rolling cube, circle around it and watch for the green block. Pull the core out when it faces you, or remove other blocks to break the structure apart. Move clear as it reforms.
Flux Construct II
The stronger variant uses the same weak point. Its floating platform can rise beyond Ultrahand’s reach. Dodge the blocks it launches, climb onto one after it lands and use Recall. Ride it back up, jump onto the platform and attack or detach the exposed core.
Flux Construct III
The core changes position quickly, so follow its green glow each time the body reforms. Use the same Ultrahand and Recall openings, with stronger weapons to make each damage window count. Avoid standing directly beneath the construct while it assembles.
Rewards and Fuse materials
Collect the dropped charges and check the arena’s chest. The large Flux Construct Core stays on the ground and cannot be put in your inventory. Fuse it directly to a weapon or shield before leaving. Stronger variants drop stronger cores. A chest or shrine crystal depends on the particular arena; not every construct has the same extra reward.