Seymour Natus

The second battle with Seymour occurs after the two separated groups escape the Via Purifico and reunite at the Highbridge. Seymour heads them off, accompanied by several Guado Guardians and Maester Wen Kinoc. Along the way, Seymour kills Kinoc and presents his body to the party with a twisted explanation of how he "saved" him. Kimahri valiantly fends Seymour off so the rest can escape, but Tidus and Yuna cannot leave their comrade behind and run back to the battle.

Strategy
Seymour absorbs the bodies of Kinoc and his Guardians and transforms into Seymour Natus, with a mechanical, hovering creature called Mortibody to assist him. Tidus, Yuna, and Auron can speak to Seymour at the start of the battle to raise their Strength or Magic Defense.

Seymour will Doublecast each of the second-level spells at the party. The Nul spells are less effective this time as before Seymour's turn, Mortibody will cast the same spell on each character, using up the Nul effect. Reflect is a better alternative, although Mortibody will regularly use Desperado, which cancels all positive statuses.

When his HP drops past 24,000, Seymour will Protect himself and start using Break on one character. Mortibody will then attack with Shattering Claw, and if the Break status is still active, they will shatter and the active party will be down to two members. Below 12,000 HP, Seymour will begin casting Flare, inflicting as much as 2,500 damage to one character. At this stage Mortibody will start casting Cura on Seymour which can be Reflected back to the player party.

Mortibody can also be used as a way to damage Seymour. Having only 4,000 HP to begin with, if Mortibody is KO'd, he will regenerate by absorbing HP from Seymour; first 4,000, then 3, 2, and finally 1,000 HP each time after that. This can be exploited further by casting Bio on Seymour, causing further damage.

Seymour will immediately Banish any Aeon summoned after their initial turn, but an Overdrive on that single action can inflict massive damage.

Alternatively, there is also an easier strategy for those who are not well prepared for this battle level-wise. All the player must do is simply enter a random encounter on the path to Seymour, and summon aeons. During the encounters have the aeons go into boost, and let the machines attack it. This will very quickly fill up the overdrive gauge. Once it is full, dismiss the aeon. This is easier with Ifrit, Shiva, and Ixion. Since they are elemental aeons, a level 2 black magic spell of their element would heal them to full health if they are low on health. Also their special attack will heal them. The same applies for Bahamut, except he cannot heal himself. He has enough HP to last the attacks of the enemy, so his gauge should fill quickly when in boost. After all aeons have their gauges full, get Yuna's overdrive gauge full as well. This will be used for Valefor. Commence the battle with Seymour and make sure Tidus casts haste on Yuna before the Seymour attacks. Use grand summon to summon valefor, and then use energy ray. Seymour tends to banish all the aeons after they attack so it is important to have the overdrive attack ready upon summoning. Repeat with all aeons, using their overdrive attacks. If they are powerful enough, each will deal 9,999 with their overdrive attack. Seymour should fall quickly. Considering that Mortibody is constantly draining him of HP.

Related enemies

 * Mortibody
 * Seymour
 * Seymour Flux
 * Seymour Omnis