Seymour Flux

The third battle with Seymour occurs after Yuna and her Guardians make their way up Mt. Gagazet to get to Zanarkand. The Ronso try to stall the unsent Seymour, and stop him from reaching them, but to no avail; he kills nearly all the Ronso easily.

Seymour finally catches up Tidus and Rikku, and reveals that he has discovered the truth about Tidus' father being Jecht, and that he plans to unravel the mystery of how Jecht became Sin, to become Sin himself, and thus, destroy all of Spira to fulfill his ambition to "save" it. When Tidus and the rest of the Guardians stand down to fight, he summons a seemingly robotic being, upon which he sits. The Mortibody, this time known as Mortiorchis, fights with him.

As with previous Seymour battles, certain party members may use the Trigger Command to talk to Seymour. For this battle, Kimahri can Talk to Seymour to raise his Strength, and Yuna can Talk to him to raise her Magic Defense.

Strategy
Seymour Flux can use the attack Lance of Atrophy to put an ally into Zombie status, and the Mortiorchis will combo with Full-Life, effectively KO'ing a character (unless the characters have high Agility, as well as many Holy Waters). Like Seymour Natus, he can also Banish an Aeon, giving it approximately one turn to attack if summoned. He occasionally casts Protect and Shell upon himself.

Three turns in, Mortiorchis will start to use Cross Cleave, which deals around 2,000 damage to the whole party. Seymour will then do a cheeky move, where he casts Reflect on himself and then rebounds Flare at a party member. However a character with high Agility or in Haste may get a turn in between and can Dispel Seymour, causing him to cast the spell on himself. Unfortunately, it does not do much damage to him. If Yuna has learned Holy it should do considerable damage. But not much other magic will be of any great effect, therefore melee attacks are the way to go and characters with the Piercing ability are most useful.

The most deadly attack is still to come: Total Annihilation, which requires three rounds of charging, and will kill anything but an extremely good party. It is recommended to cast Shell on all high-HP characters and then defend if possible before he executes this. If you get the chance it may be necessary to sacrifice an Aeon in this case.

Another strategy is to firstly have your party consist of Tidus, Lulu, and Auron for as much of the battle as possible; they should be swapped out only if necessary. Yuna should be kept waiting in the wings with an Overdrive (or have Bahamut with an Overdrive). Tidus should cast Hastega on the party for an advantage at the beginning of the battle. Lulu should cast Bio on Seymour, not the Mortiorchis as it is immune; Seymour will take about 1,400 damage from the poison every time he attacks, and this will help to whittle down his health as the battle progresses. To protect your party from Seymour's Lance of Atrophy, either equip them with Blessed armor (which can be bought from O'aka on the mountain, or can be made by customizing a piece of armor with Holy Water), or use Holy Water on the afflicted character before Seymour can cast Full-Life. Quickly Dispel Seymour's Reflect spell when he casts it on himself, as he will use Flare on himself on his next turn, and this will hit your party. (It is worth teaching Rikku Dispel if she does not know it already, as she is a very fast character.) Of course, if Reflect is dispelled in time, Flare will hit Seymour and cause him damage. Once you have brought Seymour down to about 20,000 HP, bring Yuna into the party and have her use her Grand Summon Overdrive to summon Bahamut. Bahamut's Mega Flare should finish Seymour off.

After Seymour's third defeat, he disappears, seemingly absorbed into the sky. However, his cruel murders of the Ronso would later foster great enmity between the Ronso and the Guado.

Although a really good idea is have all your people have full Overdrive gauges, with the exception of Yuna. But make sure to have all of your aeons to full Overdrive too. If you have to sacrifice an aeon, do so with Valefor, but your first aeon should also be Shiva, since her Diamond Dust move almost always does 9,999 damage which could be a big help for you in the beginning.

Related enemies

 * Mortiorchis
 * Seymour
 * Seymour Natus
 * Seymour Omnis