Titanium Sand

Sozin has obtained this through the use of his Lightning Release. He has heard stories, of a kage that went missing, and was known as the strongest of his time, for his use of iron sand. Sozin began to want more power, more abilities. However he didn't want to be a copy of someone else's skill. He wanted a upgrade, something better, something that would make him stand out. He searched for lots and lots of Titanium. Which was known as one of the strongest metals known.