You've finally made it to the Spirit Temple quest line. You're in the Construct Factory, staring at four different elevator-like pedestals, and you realize you have to build a giant robot piece by piece. It’s a massive undertaking. The Right Leg Depot in TotK is often the one that trips people up because it involves a puzzle that feels a bit more "physics-heavy" than the others. Honestly, the first time I walked into this room, I spent ten minutes just staring at the U-shaped blocks wondering if I was overthinking it. You probably are too.
Most players reach this point after clearing the four regional phenomena, though you can technically stumble into the Dragonhead Island thunderstorm earlier if you have enough hearts and a lot of patience. Once you're inside the Construct Factory, the Right Leg Depot is located to the northeast of the central hub. It’s a vertical climb, basically.
Getting the Right Leg Box Moving
Once you interact with the pedestal, a stone box containing the right leg falls from the ceiling. Your goal is simple: get that box to the Construct Factory floor. The execution? A bit more chaotic.
The room is dominated by a series of tiered platforms and a very specific U-shaped stone track. You'll see these U-shaped blocks lying around. These are your best friends. They fit onto the rails. Grab one with Ultrahand and attach the leg box to the top of it. Now, you’ll notice there are fans nearby. Fans are the engine of the Depths.
Attach two fans to the back of your U-block-box contraption. Place the whole thing on the rail. It’s going to slide up the track, but here is where people mess up: the track has gaps. If you don't angle your fans correctly or if your weight distribution is off, the whole thing just tumbles into the abyss. You've got to ensure the "hook" part of the U-block is securely looped over the rail.
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The Physics of the U-Block
Gravity in Tears of the Kingdom is a fickle beast. In the Right Leg Depot in TotK, the rail system isn't a straight shot. It curves. It inclines. It mocks you.
If you find your box is getting stuck at the transition points, try this: use one fan facing directly backward for forward momentum and one fan tilted slightly upward. This helps "lift" the block against the friction of the rail. Or, if you're feeling lazy (we've all been there), just use Recall. If the box falls, let it fall. Then, glide down, stand on a stable platform, use Recall on the box to bring it back to the highest point it reached, and then grab it with Ultrahand mid-air. It’s the "pro-gamer" way to bypass 90% of the rail puzzles in this game.
The second level of the depot involves a similar rail, but it's longer. There are more fans here. Don't be stingy. Slap three fans on there if you have to. The Zonai energy cost is negligible because there are plenty of charges lying around in the Depths anyway.
Elevators and the Final Stretch
After you clear the rail section, you’ll reach a higher platform with a large elevator. This part is actually pretty chill compared to the rail. You just need to move the box onto the elevator, hit the fans or the switch, and ride it up.
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Once you’re at the top, you’ll see a long bridge leading back toward the main Construct Factory area. Don't just carry the box. That’s slow. There are wings and fans nearby. Build a quick plane.
- Lay the Wing down.
- Attach the leg box to the center (keep it balanced!).
- Stick two fans on the back.
- Aim toward the giant green light in the center of the factory.
- Jump on and enjoy the ride.
When you land, the box will break open near the central construct. Use Ultrahand to rotate the leg—it needs to be oriented correctly to click into the hip joint. If it doesn't snap in, you're probably trying to put it on the left side. It’s the right leg. The game is literal about this.
Why This Depot Matters for the Late Game
The Spirit Temple is often the fifth sage quest. Completing the Right Leg Depot in TotK gets you 25% closer to having Mineru’s Construct fully operational. Why do you want the robot? Because walking through gloom sucks. The Construct lets you wade through gloom pools without taking damage, and you can attach cannons, flamethrowers, or even spiked iron balls to its arms. It’s basically a walking tank.
Beyond just the robot, the Depths around this depot are rich with Zoanite. If you’re low on battery upgrades, take a detour. The enemies around here are mostly Bokoblins and Moblins encrusted in gloom armor. Bring some blunt weapons or bomb flowers to crack that armor open.
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Common Mistakes to Avoid
- Forgetting the Fans: I’ve seen people try to "walk" the box up the rail using Ultrahand while standing on the block. The physics engine usually freaks out and throws you off. Use the fans.
- Wrong Rail Orientation: There are two rails. One is broken. Look for the one that actually goes where you want to go.
- Ignoring Recall: I cannot stress this enough. Recall is the most broken ability in the game. Use it if your box starts sliding backward.
- Leaving the Box Behind: If you teleport away, the box resets to the pedestal. Don't leave until you’ve delivered the goods.
The Construct Factory is one of the most atmospheric parts of the game. It’s quiet, dark, and massive. Taking the time to master the Right Leg Depot in TotK makes the rest of the factory feel much easier. Once you have the rhythm of the U-blocks down, the Left Leg and the arms are a breeze.
Your Next Steps in the Construct Factory
Once the right leg is snapped in, you’re not done. You still have the other limbs. If you haven't done the Left Leg Depot yet, head west. It involves a lot of rockets and fire, which is arguably more fun than the rail puzzles.
After all four limbs are attached, the Construct will fully awaken. You’ll then need to lead it to the Spirit Temple itself, which is located further south. Make sure you have some Zonaite in your inventory because you'll want to upgrade the Construct's equipment at the nearby forges as soon as possible. The boss fight at the end of this quest line is much easier if you have a cannon attached to one arm and a shock emitter on the other.
Go get that robot finished. The Depths aren't going to explore themselves, and having a giant mechanical suit makes the whole process a lot less terrifying.
Actionable Insight: If you find the U-block puzzle too frustrating, use a Hover Stone from your inventory. Activate the stone, attach the leg box to it, and move it manually using Ultrahand. You can "staircase" your way up by using two Hover Stones, moving one above the other repeatedly. It completely bypasses the intended rail mechanic.