Seymour Omnis

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Final Fantasy X Enemy
Seymour Omnis
HP MP Gil 80,000 999 12,000 Strength Defense Magic 20 180 35 M. Def Agility Evasion 100 40 0 Accuracy Luck 0 20
Japanese	{{{japan}}}
Romaji	{{{romaji}}}
Location	Garden of Pain
AP Awarded	24,000
Overkill HP	{{{Overkill HP}}}
Overkill AP	{{{Overkill AP}}}
Common Steal	Shining Gem
Rare Steal	Supreme Gem
Bribe	N/A
Common Drop	Lv. 3 Key Sphere
Rare Drop	Lv. 3 Key Sphere
Ronso Rage	N/A
Weak Against	Variable (magic)
Resistant to	Variable (magic), Poison
Immune to	Variable (magic), Silence, Sleep, Blind, Petrify, Slow, Zombie, Power Break, Magic Break, Threaten, Death, Provoke, Doom, Demi, Delay, Eject
Absorbs	Variable (magic)

"I will learn to control it, from within. I have all the time in the world. Since you were gracious enough to dispose of Yunalesca...the only means of destroying Sin is forever gone. Now nothing can stop us!"

— Seymour

The final battle with Maester Seymour Guado is staged within Sin, where Seymour has abandoned his plan of becoming Sin in favor of learning to control Sin in his megalomaniacal effort to purify Spira.

Seymour's form is similar to Natus, only transparent with a shimmering, inhuman glow. There are no tricks this time, no surprise special moves that Seymour will suddenly wipe out the party with. This is purely a magic battle, and Seymour is clearly dominant.

He is hovering in the air in front of four huge disks called Mortiphasms. As each disk rotates, a colored section will face the side closest to Seymour; these will determine which 4 level-three spells he will cast at the party each turn. If each color is the same, the spells will have increased power. Seymour's magical weakness is determined by whichever side is furthest away from him when he is attacking. After each attack, the disks will rotate so a new spell is used. As the disks are all facing the same way at the beginning of the battle, one of the first actions should be to forcibly rotate one by attacking it, this will prevent a barrage of very powerful spells being cast one after the other. Physically attacking a Mortiphasm will cause it to rotate to the left, and using magic will cause it to rotate to the right. However, the Mortiphasms, unlike Seymour, are out of reach, so only Wakka can attack them physically.

After six rounds, Seymour will begin casting multi-Dispel and then following with Ultima. With no way of reducing the damage, it can potentially do over 4,000 damage to all characters. By this point, Lulu should know Doublecast and Flare, and Yuna will have obtained Holy; they can all be used to great effect against Omnis.

An interesting way to handle this battle is to let your Aeons do the work; unless Seymour is using Water spells, summon the corresponding elemental Aeon (Ifrit if Seymour attacks with Fire, Shiva for Ice and Ixion for Lightning). They will absorb the spells although their overdrives won't be very helpful unless they survive Ultima and Seymour changes elemental characteristics.

An Alternate Strategy is to have Auron use Armor Break on Seymour, then summon Anima in Overdrive mode and have her perform Oblivion, since Seymour has less than 99999HP, Oblivion will kill him in one hit.

"You would oppose me as well? So be it."

—Seymour to Anima if you summon during the fight

"So it is you, after all, who will send me. But even after I am gone, Spira's sorrow will prevail."

— Seymour to Yuna after his final defeat