Moldorm is the boss of the Tower of Hera, a giant segmented worm. This battle is unique due to the small, elevated arena with no railings, making falling off a constant threat. Your primary weapon will be your sword, and the Hammer can be used for a brief stun.
Phase 1: Tail Strikes
Moldorm will move rapidly across the platform, attempting to bump Link. Its only weak point is its glowing tail. Your goal is to position yourself behind Moldorm and strike its tail with your sword. Each hit will cause it to recoil and speed up. The biggest danger is being knocked off the platform, which results in falling damage and having to climb back up, wasting time. Try to anticipate its movements and aim for its tail when it's moving away from you.
Phase 2: Increased Speed & Aggression
As Moldorm takes damage, it will become significantly faster and more aggressive, making it harder to get behind it. It will also perform more erratic movements. Continue to focus on striking its tail. If you have the Hammer, you can use it to stun Moldorm briefly, creating an opening to hit its tail. However, be mindful of your stamina. The key to this fight is patience, precise movement, and avoiding falling off the edge. Defeating Moldorm rescues Osfala and grants you the Pendant of Courage.