Originally Posted by Blackestmage's Boss FAQ on gamefaqs.com
Optional Boss: Tantarian
HP: 21 997
MP: 1456
Level: 41
AP: 30
Steal: Ether, Elixir, Silver Fork, Demon’s Mail.
Difficulty: Tough
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Let me explain Tantarian’s pattern. Tantarian will be hiding in a 200 pages
book. You can only find him on the pages 150-200. Now to reach the pages, you
have to damage him. Because of his incredible defense, you will deal
extremelly low damages. Now, each times you attack him, the damage points are
added to the total damage you already dealed on him. You need to reach the
pages between 150 and 200, in order to make Tantarian appear out of the book.
Note that if the total damage you deal on him goes from under 150 to over
200, the pages are reset to 0. Now let me list his attacks. While in the
book, the boss will use three attacks; Paper Storm, which is quite deadly,
dealing over 700 points on party; Edge, which deals around 800 points on one
target and; Doom, number 10 is put over one target’s head. As it reaches 0,
it’s Death. While Tantaria is discovered, he will only use Poison, which is
nothing to worry about when you got Antibody. To win, I recommand you to put
all your characters in back row to weaken the boss’s damage potential by
half. If you are fighting the enemy in Disc 3, then your party will be made
of Zidane, Freya, Vivi, and Amarant. Have Freya cast Rei’s Wind on party to
then support. Amarant will help Freya to support the party as well. While in
the book form, Tantarian’s quite dangerous so it’s a good idea to rely on two
characters to heal. With Zidane and Vivi, they should both be attacking the
book form(Zidane with physical attacks and Vivi with Fira). As you catch
Tantarian out of the pages, STOP attacking with physical attacks. If you do,
Tantarian will yell "Ouch!" to then hide right back in the book, forcing you
to open it to the right pages again. Instead, just have Vivi casts Fira over
and over. Don’t do anything else, don’t even use Amarant’s Throw ability,
which will be considered like a physical offense, allowing Tantarian to
escape in his pages. After a few turns though, the book will close itself so
you will have to do the process again, without changing anything of the
strategy. Eventually, you will be victorious. What do you get out of this
battle? The opportunity of getting some Sprint Shoes(Auto-Haste).