Seymour Natus The second battle with Seymour , in his Seymour Natus form , occurs after the two separated groups escape the Via Purifico and reunite on the Highbridge . Battle . Seymour 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 with Trigger Command s to raise their Strength or Magic Defense . The Mortibody starts a round by casting a basic elemental spell on the party . Seymour will follow with a Doublecast of that spell ' s Level 2 . Mortibody will regularly use Desperado , which removes all positive statuses . When his HP drops past 24 , 000 , Seymour will protect himself and start using Break on one character . Mortibody will attack with Shattering Claw , and if the Break status is active and it targets that character , they will shatter and the active party will be down to two members . Below 12 , 000 HP , Seymour will cast 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 . If Mortibody is KO ' d , it will regenerate by absorbing HP from Seymour — first 4 , 000 , then 3 , 000 , 2 , 000 , and finally 1 , 000 HP each time after that . If an aeon is present on Seymour ' s turn , instead of his usual attack he will use Banish , which eject s the aeon ; unlike instant death , aeons are not immune to Eject . Banish is never used against characters , though if hacked to do so , it functions just like any other ejection attack . Seymour changes his attack patterns as his HP drops , however he must be attacked to cause the changes . If Poison damage brings him under the required value , his pattern will not change until the next time he is attacked . However , Mortibsorption will trigger the pattern change . Strategy . NulElement is useless unless the party has Haste , which can let the NulElements take effect after Mortibody attacks . Reflect is a good alternative as only Mortibody ' s Shattering Claw can hurt the team then , although Desperado nulls all status enhancements so the party must reapply the status . Summoning an aeon that has a full Overdrive can inflict massive damage . However , long - term use of an aeon is not possible in this battle due to Banish . The player can fill up the aeons ' Overdrives before the battle and then summon them one by one . Repeatedly killing Mortibody can be used as a way to damage Seymour . This can be exploited further by casting Bio on Seymour , causing further damage . Equipping SOS Reflect armor results in near - invincibility , although it is very hard to obtain such an armor by this point . Other appearances . " Final Fantasy Record Keeper " . Seymour Natus first appeared in the Challenge Event Marriage of Convenience , Into the Bevelle Palace as the event ' s final boss . He later appeared in Ultimate Guardian as a mid - boss . Currently , he is the final boss in the Record of the Highbridge . Contrary to his source material , the player has to avoid attacking the Mortibody , else risking a punishing counter , and just focus on Seymour himself . This is primarily a defensive battle for the party , so attaching Protect and Shell to White Mage - type characters is recommended ; and adding Reflect may help to buffer the boss ' s onslaught of spells . Defeating this boss in the Classic series of each event unlocked Yuna and later Kimahri as player characters . Etymology . This effectively makes the name " Seymour Reborn " . He is called " Seymour spectral " in the French version , " Neo Seymour " in the Spanish and Italian versions , and " Seymour Varia " ( Variant Seymour ) in the German version .