temple of the ocean king
its the north eastern part of the south east map
that's the last sea chart that you get in the temple of the ocean king.
you have to bomb it three times to make it go away
on the isle of gust in the north western sea .
go north,east,east,north,north
something's wrong then.
he is a traveler by the name of nayru
Go to zauzs island (exactly north of the isle of gust EXACTLY NORTH)
You have to go to the North Western sea and then go to Zaus's Island. Then he will make the Phantom Sword for you.
Take them to the island that's northest, one the north west sea chart.
To get the third map you need to get the salvage arm - which you used to get the sun key - and salvage in the top right hand corner of the north western map. That way you can get to south eastern map.
go on Molida island and dig in batween the palm tree closets to the path as u can