Dark Aeons (Optional Superbosses)
The Dark Aeons are more recent additions to Final Fantasy X. They were added to the game for the international re-release as well as the HD Remasters for PlayStation 3 and PlayStation 4. They have subsequently appeared in every version afterwards.

Each of the Dark Aeons appears very similar to their counterparts that Yuna can summon, but they are summoned by Yevon’s acolytes in various areas across Spira. There are two Dark Aeons that gamers typically encounter accidentally (Dark Valefor in Besaid and the Dark Magus Sisters along Djose Highroad), which may be what led you to this page to read up about them.

The Dark Aeons all appear after the team escapes from the city of Bevelle and after they exit the Via Purifico. Some of the Dark Aeons require you to perform specific actions to make them appear, whereas others only require you to travel to the right area of the map, and you will find them as soon as you get there.

Unfortunately, if you’ve missed certain items, there is no way to go back and get them without defeating the Dark Aeons that have spawned. The items that are blocked off include:
- Completing the Cloister of Trials that are blocked
- Obtaining the
Sun Crest in Zanarkand
- Obtaining the
Jecht Sphere in Besaid Village
- Recruiting Blitzball Players in Besaid Village
If you have missed any of these items, you will have to defeat the Dark Aeon blocking them to obtain them (or restart your game).

All the Dark Aeons are extremely difficult to defeat. They are as difficult as the other two superbosses, Nemesis and Penance, and you should prepare your party before attempting to defeat any of them. Head over to the Tips and Tricks section (under the Advanced heading) for more information on leveling your characters, Stat Maxing them, and customizing the strongest equipment available:
Advanced Tactics
Tips and Tricks

Customizing strong weapons and armor, quickly leveling your characters, maximizing their stats, and other helpful end-game tips and tricks.
Continue reading below for more information on how to encounter each of the Dark Aeons and how to defeat them.
Dark Aeon Subsections
Dark Valefor

Dark Valefor spawns in Besaid Village, and the Aeon and its summoner will immediately ambush you as you enter the town.
Dark Ifrit

Located in the northernmost portion of the Sanubia Desert, where the Al Bhed town of Home used to be located before it was destroyed.
Dark Ixion

You can find it roaming around the Thunder Plains after initiating a few encounters.
Dark Bahamut

You can find it in the room where you fought Yunalesca back in the Zanarkand Ruins.
Dark Yojimbo

Appears in the same cave where you found regular Yojimbo: the Cavern of the Stolen Fayth.
Dark Magus Sisters

You can fight each of them one-by-one if you outrun them in the Mushroom Rock Valley.
Defeating each of the Dark Aeons will unlock Penance, the strongest superboss in the game.