Mangochutney
All of Gilgamesh's swords are juuuuust different enough from the originals that Square-Enix, if they existed in Ivalice, couldn't sue him. Niiiice. :D
This is Brotherhood, Tidus's sword from FFX. Except that it's totally not, for all legal purposes! Seriously! It's, like, STEP-Brotherhood. Yeah. Step-Brotherhood. Let's go with that.