Lanmolas in Wüstenpalast

Although you can use your sword, arrows and bombs to defeat the three sand worms that guard the palace's Pendant of Power, the Ice Rod makes short work of the creatures. Whichever weapon you use, strike for a Lanmola's head to land a damaging blow. Avoid the debris that the worm sends flying when it emerges from the sand.

If you have an Ice Rod, you'll need to hit each Lanmola in the head only twice. If you're using the sword, employ the Whirling Blade technique to smite the worm more effectively. You'll receive a Heart Container and the Pendant of Power after you defeat all three worms.