you have to get all the pure crystals and get zauz to build it for you
phantom sword
get the phantom sword first....
if you can get all of the pure metals, zauz can make a phantom sword. to finish the game, you need that sword. if you strike a phantom in the back with the phantom sword, they WILL die. other wise, no.
To get the Phantom Sword, take all three pure metals, Crimsonine, Azurine, and Aquanine, to Zauz, the legendary blacksmith, who will create the Phantom Sword for you.
you kill a phantom by getting the phantom sword and then hitting them in the back
Once the Phantom Sword is in your possession, go to the Temple of the Ocean King, descend as far as you can, and face your final battle with Bellum.
First off its called the "Phantom sword" not the master sword and you have to get all 3 pure metals but i dont know its location after getting them
they are sword, boomerang, bombs, bow, bomchus, grappling hook, hammer, and finnaly the phantom sword.
Get to the temple of the ocean king and kick some phantom asss
You can't kill phantoms until you get the phantom sword. But when you get the phantom swords you just hit them in the back with the sword.
you could hit them with your powered up sword, which includes 10 power gems, or kill them with phantom sword
you get the third precious metal for the phantom sword.