Omega Weapon (Record Keeper)

Omega Weapon in a Nightmare-class boss in Final Fantasy Record Keeper. It is the boss of the Omega Drive Record in the Nightmare Dungeons. To face it, the player must first defeat Iron Giant (VIII), Porphyrion (XI), Atlas (XIII), and Braska's Final Aeon (X).

This version of Omega Weapon is based on its incarnation in Final Fantasy VI; it takes its appearance from VI, its attacks are "Nightmare" variants of attacks all found in VI, and Omega Drive is its special ability in VI.

AI Script
Omega Weapon is fought in three phases, divided into 65535 HP, 223666 HP, and 149111 HP. Each time its HP is depleted it casts Vengeance, removing all the party's buffs. It will also counter all White Magic, Black Magic, and Ninjutsu damage with Heartless Angel, sapping the party's HP to 1. All but one of Omega Weapon's attacks deal magic damage, ignore Resistance, and it covers a wide variety of elements with these attacks, so defensive buffs are of little use. Its signature attack is Nightmare Omega Drive, which deals massive defense-ignoring non-elemental physical damage to all characters, almost certainly KO'ing the entire party in one blow.

In its second phase, which makes up most of the fight, Omega Weapon spawns two Mana Spheres directly above and below it, variably Red or Green. When a Greeb Mana Sphere is KO'd by a party member directly in front of it on the field, it will cast a curative spell on the party, but if it is attacked by any other party member than those two, it will be absorbed by Omega Weapon and heal it. Red Mana Spheres act similarly, if anyone other than the party members in front of them attack them, they explode to damage the party, but if KO'd by those two characters in front of it, it will explode and deal damage to Omega Weapon.

The potency of the effects of the Mana Spheres varies depending on if one or both of the two characters attacked them, and how many attacks it took to KO them:

In simplest terms, the optimal results can be achieved by having each character attack the Mana Spheres once each and this being enough to KO them. Both types of Mana Sphere have 16,769 HP.

When a Mana Sphere has been in play for four of its turns, Omega Weapon will absorb it; if it absorbs a Green sphere it uses Absorb to heal itself, and for Red spheres, it will use Nightmare Omega Drive. If the player fails to send Omega Weapon into its third phase before ten Mana Sphers are killed or absorbed, it will use Nightmare Omega Drive anyway. For this reason the player cannot solely focus on killing the Mana Spheres, they simply do not damage Omega Weapon enough to trigger its third phase. The player must balance attacking Omega Weapon with attacking the Mana Spheres.

Once Omega Weapon enters its third phase at just under 150,000 HP, the Mana Spheres stop spawning and Omega Weapon begins its final assault with the most powerful attacks it knows.

Turns
Phase One:
 * Nightmare Quake
 * Nightmare Tsunami
 * Nightmare Flare Star
 * Grand Delta

Phase Two:
 * Random attack; Nightmare Atomic Rays, Nightmare Absolute Zero, Nightmare Wave Cannon, Launcher, Nightmare Delta Attack

Phase Three:
 * Nightmare Holy
 * Nightmare Flare
 * Nightmare Meteor
 * Nightmare Forsaken

Strategy
Characters who can use 5⭐ Combat abilities receive Record Synergy in the fight, so physical brawlers are the way to go. The player's healer should be placed in the middle of the party line-up, as that position cannot attack either Mana Sphere safely. Omega Weapon's damage output is considerable, but the healing afforded by KO'ing Green Mana Spheres will allow the player to stay on top of things.

Double Cut is a good ability for this fight for attacking the Mana Spheres; as long as each hit from Double Cut does under 4,500 damage, two Double Cuts will kill a Mana Sphere and trigger its best reaction. Otherwise, if a character is too powerful and Double Cut would kill a Mana Sphere outside, Lifesiphon is a good alternative, charging the Soul Break gauge and likely dealing 9,999 damage, allowing a second attack from the second character to finish off the Mana Sphere.

In the final phase, with no Mana Spheres to aid in healing, the player is on borrowed time before Omega Weapon's powerful attacks obliterate the party. This is the time to go all out and finish off Omega Weapon quickly. This is another reason Lifesiphon is a good ability to use for each character, charging up their Soul Breaks while waiting for the final phase when they can unleash them on Omega Weapon and destroy it.

For their victory the player receives the Record Crystal needed to craft the Rank 6 Combat ability Omega Drive.