Moldorm is the boss of the Tower of Hera, a giant segmented worm that moves rapidly across the arena. The battle takes place on a small, elevated platform with no railings, making falling off a constant threat. Your objective is to hit Moldorm's glowing tail. Each hit will cause it to recoil and speed up. Use your sword to strike its tail whenever you get an opening.
Moldorm's main attack is simply bumping into Link, which can knock you off the platform. If you fall, you'll take damage and have to climb back up, wasting precious time. Try to anticipate its movements and position yourself to strike its tail from behind. The Hammer can also be used to stun Moldorm briefly, giving you a chance to get a hit in. After several hits to its tail, Moldorm will be defeated, and you'll rescue Osfala, obtaining the Pendant of Wisdom.