Dark Anima is an optional boss in the International, PAL, and HD Remaster versions of Final Fantasy X. Available after viewing the campfire scene at Zanarkand Ruins, and then completing Wakka's ball trial on Mt. Gagazet once more, Dark Anima will appear at the entrance to the mountain. Dark Anima has the most HP among the Dark Aeons, but if the player knows what each attack does and enters the battle with the right setup, she is not overly difficult compared to Dark Bahamut and the Dark Magus Sisters.