Quote Originally Posted by Shiny
Durandal!
You are correct, the answer is Durandal!

It was a legendary sword that belonged to the Crusader Roland. He tried to break it rather than let it fall into enemy hands, but couldn't. He had to throw it in a poisoned stream instead.

It is the default name for a sword for Tidus with Triple AP, which can be customized with 50 Wings to Discovery.

Your go, Shiny.