you kill them by attacking their backs with the phantom sword
~icesteak's addition~ also, if u set ur spirit power to ciela, or spirit of courage, u can shoot shock waves. if u dont wanna get close to the phantoms, u can just aim a shock wave at their backs. works just as good!
You have to get all three pure metals
Defeat Bellum in the Temple of the Ocean King.
you win the game and you get tera back
the second time when bellum is on the shost skip you have to shoot the eyes on the ship and also shoot the goo he is firing at you other wise you die, eventually the ship sinks
He is at the bottom of the ocean king temple thingy. When you defeat him there you will face him again on the ghost ship, where he (Warning! Spoiler ahead!) possesses Linebeck.
This is because the developers of the game kept it there in case you wanted to fight the final battle(s) again.
*Caution- Major plot spoilers are included*The Phantom Hourglass is a magical artifact that allows you to go through the Temple of the Ocean Kingwithout losing any life. However, the Phantom Hourglass, as the name states, is an hourglass, and therefore, gives you a timed speedrun of the Temple of the Ocean King. There are 50:00 Minutes maximum that you can collect by finding the Sand of Hours. you will go to the heart of the temple at the end of the game to defeat Bellum, the Evil Phantom. Using the Hourglass, you will get the Phantom Sword.
You must enter the Temple of Ice on the Isle of Frost and defeat the boss, a two-headed dragon.
If you haven't found the phantom sword you need to find it. It is mandatory you find it to beat it. If you already have the phantom sword I'm not sure what else you must do. I can't remember where the phantom sword is but look it up on youtube "Where is the phantom sword?" you'll find an answer.
to defeat enemies as a goron just simply tap them wit hthe stylus
Stop by Cannon island and pick up a cannon, then go back to the Temple Of the Ocean King.
Defeat Belum and and save Tetra