you will find it later on whilst in goron island (sorry i forgot the temples name!)
You can't, sorry
there 4 i think
first your arxeidia
in the courage temple on molida island
You get it in the temple of wisdom.
the bow is on molida island in the courage temple
the island of ruin
take it to the sun door on molida island
you must lower the water
You can find it on ebay for cheap around $17
phantoms are the metal guards in the ocean king temple (the legend of Zelda phantom hour glass) and in the tower (spirit tracks )
a triangle and a up sidedown triangle in the middle