The Legend of Zelda: Tears of the Kingdom introduces players to a massive subterranean environment filled with secrets, challenges, and critical narrative milestones. One of the most unique adventures in this game is the late-game main quest that leads Link to uncover a hidden mechanical companion. Successfully finishing this questline requires patience, exploration across different vertical layers of the map, and strategic puzzle-solving inside dangerous assembly depots.

Beginning the Sacred Journey

To initiate this specific storyline, you must first advance through major campaign beats like discovering clues about the fifth sage. The adventure officially starts when you access the shrouded Dragonhead Island floating high in the sky and interact with a mysterious glowing relic. This green Zonai artifact emits a focused beam of light that points toward a specific structure on the surface world below.

Carrying the relic down from the stormy skies involves building a customized flying vehicle out of wing components, fans, and steering controls. You need to follow the laser accurately until you safely land near the water-filled ruins located at Tobio Hollow. Inserting the device into the proper altar reveals a concealed staircase leading straight into the dark depths of Hyrule.

Assembling the Zonai Construct

Upon descending via the elevator, you will find yourself inside the sprawling Construct Factory surrounded by four distinct assembly storehouses. The spirit of the ancient sage Mineru requests your assistance in constructing a physical body capable of housing her mystical essence. You must visit the Left-Leg, Right-Leg, Left-Arm, and Right-Arm Depots in any order to recover the necessary components.

Each independent depot presents unique engineering hurdles, requiring you to navigate flowing lava, deep water, and steep tracks using Link's building abilities. Once you successfully transport a piece back to the main factory floor, you break the container and attach the limb to the central torso. Completing this mechanical frame grants you a customizable rideable partner that can safely walk across corrupted patches of ground.

Conquering the Spirit Temple

With the robotic guardian fully assembled, your next primary objective is to travel southeast through the gloomy trenches toward the Spirit Temple. Along the way, you can customize your construct by attaching powerful weapons like spiked balls, cannons, or flame emitters to its arms. These enhancements are absolutely essential for surviving the hostile enemy encampments guarding the dark paths ahead.

Reaching the temple summit triggers a dramatic showdown against the Seized Construct, a corrupted boss that fights inside an electrified boxing arena. Utilizing your companion to block incoming attacks and push the enemy into the surrounding wires is the key to victory. Defeating this powerful foe purges the darkness and allows Mineru to permanently pledge her support to your cause.

Reaping the End Game Rewards

Completing this major endeavor rewards players with the Vow of Mineru, allowing you to summon the mechanical construct anytime during your travels. This companion provides exceptional utility by serving as a shield against environmental gloom damage and offering extra offensive firepower. Additionally, clearing this quest unlocks deep historical lore regarding the Imprisoning War and the ancient history of Hyrule.