Ultima Buster (Record Keeper)

Ultima Buster in a Nightmare-class boss in Final Fantasy Record Keeper. It is the boss of the Ultima Record in the Nightmare Dungeons. To face it, the player must first defeat Phantom Train, Liquid Flame, Spherimorph, and Dreadnought
This version of Ultima Buster is based on its incarnation in Final Fantasy VI; it takes its appearance from VI, its attacks are themed on the three core elements similar to its basic attack patter in VI, and it is able to cast Ultima as its strongest attack in VI.
==Stats==
==AI script==
Throughout the fight Ultima Buster will counter any form of physical or ninjutsu damage with Death. Unlike several other Nightmare bosses, who have different HP gauges for all the phases of the battle, Ultima Buster has one HP gauge, and the fight will end in the player's victory if Ultima Buster's HP is depleted in any stage of the fight.
In its first phase it casts Fire, Blizzard, or Thunder randomly every turn, variably targeting one character or the entire party. Every third turn it will cast Meteor, dealing non-elemental damage to the party. When it falls below 80% HP (152,052 HP), it summons a Mana Sphere. At this time Ultima Buster gains a Reflect status that cannot be dispelled, and any form of magical damage that bypasses Reflect will simply be evaded. 
Ultima Buster's attacks in this phase are Fira, Blizzara, and Thundara, which it casts on single targets, Nightmare Laser which deals physical damage to the entire party, and Flare Star, which deals fire-elemental damage to the entire party. Every other turn, Ultima Buster will use Charge, absorbing power from the Mana Sphere. When it has used Charge four times, it will dispel the Mana Sphere and cast Ultima Nightmare, dealing massive non-elemental damage to the entire party, easily hitting the 9,999 damage cap. If the party is able to KO the Mana Sphere before the fourth usage of Charge, Ultima Buster will still cast Ultima Nightmare, but its power will be much lower, depending on how many times it used Charge.
With Ultima Buster effectively invulnerable to the party's attacks, the player must damage it by attacking the Mana Sphere, which will react differently depending on the element of damage the player uses against it. Fire and Lightning cause it to use Focused Counter, dealing 9,999 damage to Ultima Buster. Dark, Holy, and non-elemental provoke Divided Counter, dealing 9,999 damage to the Mana Sphere and lower damage to Ultima Buster. Ice and Water attacks make the Mana Sphere use Healing Counter, casting a curative spell on the party. It will not react to Poison, Earth, or Wind damage. Attacks that deal multiple hits will trigger a separate counter for each hit. Note also that, strictly speaking, "non-elemental" as a damage category is not the same as attacks that do not have an element. The Mana Sphere has 40,075 HP.
After the Mana Sphere has been removed from the battle, either by the party KO'ing it or Ultima Buster absorbing it on the fourth use of Charge, Ultima Buster permanently shifts to its third attack pattern and loses its immunity to magic. It repeatedly casts fourth-tier "Nightmare" spells that ignore Resistance, and on every fifth turn it uses Southern Cross, which deals massive fire-elemental damage to the entire party, ignoring Resistance and likely hitting the damage cap. It will continue to follow this attack pattern until it is KO'd.
===Turns===
Phase One:
* 22.2% chance each of Fire, Thunder, or Blizzard on single target, 11.1% chance each of Fire, Thunder, or Blizzard on entire party
* Casts Meteor every third turn
Phase Two:
* 25% chance each of Fira, Blizzara, or Thundara, 15% chance of Nightmare Laser, 10% chance of Flare Star
* Uses Charge every second turn
Phase Three:
* 33.3% chance each of Firaja Nightmare, Blizzaja Nightmare, Thundaja Nightmare
* Uses Southern Cross every fifth turn
==Strategy==
Characters who can use 5⭐ Black Magic abilities receive Record Synergy in the fight, so the player will want an army of mages, preferably armed with Chain Firaga and Chain Waterga; Chain Thundaga and Chain Blizzaga also work for the same counter mechanics, but will not meet the medal conditions for mastery. The player can forego bringing Holy or Dark mages to the fight, as their focus should be in KOing Ultima Buster, not the Mana Sphere.
Overall, Ultima Buster is not very challenging in comparison to other Nightmare bosses - its HP is quite a bit lower than others, and Black Magic abilities have high damage multipliers. The player's mages, provided they are sufficiently leveled, can easily hit the 9,999 damage cap with Rank 5 Chain spells, dealing four hits of 9,999 to either target in the fight, and against the Mana Sphere this will trigger four Focused Counters of the same damage against Ultima Buster. Simply put, 190,000 HP will not last long against such damage output.
With Shellga in place to defend against Ultima Buster's attacks in the first and second phases, the player can quickly whittle down the Mana Sphere while dealing damage to Ultima Buster. Once the Mana Sphere is gone Ultima Buster's damage output intensifies, but it is vulnerable to Black Magic again and so will quickly fall to a few more Chain spells.
For their victory the player receives the Record Crystal needed to craft the Rank 6 Black Magic ability Ultima.
== Gallery ==
Category:Bosses in Final Fantasy Record Keeper