The Undying is the final boss of Final Fantasy XII. It is the final form that Vayne takes by merging with Venat and assimilating components of the Sky Fortress Bahamut into his body after he is mortally wounded by Vaan. This form is draconic, as the Sky Fortress's namesake is the recurring dragon summon Bahamut. The final boss theme is "Struggle for Freedom". It features a medley of the other boss themes, as well as a continuous riff of the "The Archadian Empire" and the main theme of Final Fantasy XII, representing the two motifs struggling against each other. The theme was composed by Hitoshi Sakimoto. The Undying's special moves, Megaflare, Gigaflare (Sword) and Teraflare, are signature moves of Bahamut's different forms from the series: Megaflare is used by Bahamut, Gigaflare is used by Neo Bahamut, and Teraflare is used by Bahamut ZERO.