Use the grappling hook on the things sticking out of the ground. Use your grappling hook to make a rope on the one that are diagonal to each other. When it spits it's fireballs one will be hit and the other will try to sever the grappling hook. Repeat the process a few times until the masks on them are broken. Then when they do an attack, latch on to the stick and then its tongue. then while it's stunned slash it with your sword and repeat that a few times and it'll be dead.
I'm assuming you mean Gleeok, and if it is, you get one of the three pure metals
go west of that place on the sea chart and then you will see the harrowing island
the boss of the 2 headed dragons the boss's name is Gleeok. after you defeat Gleeok you will get the 2nd metal of the phantom sword
Legend of Zelda 1-First Temple Phantom Hourglass- Temple of ICE Oracle of Seasons-Explorer's Crypt.
youtube: legend of zelda phantom hourglass by cesaritox09
In Legend of Zelda NES-At the end of the first temple. In Phantom Hourglass DS- Temple of the Ice. In Oracle of Seasons-In explorer's Crypt
beat the goron temple
beat bellum, the final boss
You have to side from them you can't beat them
Defeat Belum and and save Tetra
beat the pyramid temple
you hit her