Name of the final battle song against Kuja in Final Fantasy IX. Dark Messenger, also called The Darkness of Eternity in Dissidia, incorporates Kuja's second theme, Immoral Melody.
Perhaps Square's most underwhelming battle, this song more than makes up for it.
Kay, Deathguise killed. I'm gonna go save, use a tent, and then check my Black Holes to see if I have enough to spam Kuja with. If I don't then more Dark Messenger.