Zauz's Island

Zauz's Island is home to the blacksmith, Zauz, in Phantom Hourglass, who lives in utter solitude amongst the several Cuccos that reside there as well.

Features
Zauz's Island, the northernmost island on the Northwestern Sea Chart, is not an island that appears on the chart when Link retrieves it from the depths of the Temple of the Ocean King, it must be found and charted later through seafaring means. This isle is also home to a small puzzle of sorts, described in vague detail by a truth stone at the northern coast of the island: on the western and eastern sides of the island, there are two stone tablets each that, when two connecting lines are drawn between them, converge at a point at the isle's southern tip. In the event that Link digs at the intersection of the two imaginary lines, he will unearth a buried Treasure Chart. There is also a treasure chest out in the open, sitting on the small platform on the eastern side of the island; in order to reach it, Link must pick up a Cucco nearby and use it to glide to the small platform upon which the chest sits.

After garnering the three Pure Metals, Zauz will forge the Phantom Sword, which is Phantom Hourglass's most powerful sword, here on the island.

once you get the phantom sword, you have the ability to defeat the phantoms in the temple of the ocean king, that you couldn't kill before. you will first need to get the 3 pure metals (Crimsonine, Azurine and Aquanine) before you can get zauz to forge the phantom sword.