emerald weapon 9999 hit damage

[Meggy The Star]

i try kill emerald weapon but one attack i cant Survive that i dont reramber name but something about metaria attack hit 9999 damege and am losing and my characters hp is more then 8500 not 9999 Even if it's 9999 they'll die in one hit what i must do?

[Caboose]

there is a trigger for this attack if i remember right. some summon or spell will make the emerald weapon retaliate with it.

Aire Tam Storm: Deals damage to the entire party equal to the amount of materia that character has equipped * 1111. Only used when the eyes are present and after two Emerald Beams, or one after Revenge Stamping ten times; or as a counterattack at any point in the battle after taking 500,000 damage, to Knights of the Round. Also cancels out most status effects.
from the wiki, so yeah break the eyes every time you can, and do not use KOTR, ever. what's your level anyway? it's a pretty end game stuff to beat the weapons, come in with tons of elixir, some high end materia, at least one final attack + phoenix combo and you should be good to go

[Xengre]

The best solution is to simply do one of the following:
1) Equip less materia (say 4-5 max per character) and Emerald's Aire Tam Storm will only do 4444 or 5555 damage leaving enough leeway to get hit again for most characters if you were topped up so you have some breathing room to recover. You don't need much materia in this battle anyways as the boss is actually quite weak just very tanky.

2) Final Attack + Phoenix or the superior Final Attack + Life2 + Mega-All (also allows for slash-all which is convenient this fight due to eyes).

Some things to make it even easier...
W-Item materia to duplicate the item Hero Drinks and Mega-Elixer for lazy healing and super buffs. You can cast 3 (technically 4 but barely gain 10% from 4th) Hero drinks per character in the battle for massive stat boosts (massive being a truly grand understatement here, if your stats are high enough it could make almost every attack the boss does miss and your multi-hit limits do 9999 damage per hit instead of 3-5k).

Mega-All from Northern Crater (yes you can leave after getting it) which gives Slash-All great for dealing with Emerald Weapon eyes and for Final attack + life to fully auto-revive all characters on deaeth (assuming you have the MP for the spell, cheaper than phoenix... phoenix has usage limit of 5x per battle like other summons if mastered and less if not... and Ruby Weapon/Sephiroth heal form phoenix).

Big Guard E-Skill (easy to get look it up). Grants 50% damage reduction to physical and magical damage and haste to all party members for a low MP cost.

Cut materia for tons of damage.

Yes, KotoR looks amazing with its high damage many hit summon but it takes very long and it isn't necessarily efficient in terms of DPS vs boss turns in anything except wait mode IIRC. Instead, just spam 4x Cut/Slash-All attacks and when you have it a limit break. Alternatively, get Mime. Hero Drink 4x on Cloud. When his limit comes up just mime spam it repeatedly until you have to do something else like heal. The damage will be better than KotoR and it will be far faster. Then just attack with Cut/Slash-All until his next limit break and then mime all over again.

As you can see this requires almost no materia resulting in Emerald Weapon doing piddly damage.

Desired materia for all characters: HP Plus, Cut/Slash-All/Mega-All

Desired materia on an individual character depending on above build choices: Final attack + Life or Phoenix, Mime, W-Item

This means you will have around 2-4 materia on your characters resulting in Emerald Weapon doing very pitiful damage, especially if you use hero drinks. The Underwater materia to remove timelimit is not necessary as 20 mins is honestly excessively long compared to what you need.

[Zero McDol]

Be sure to keep the characters full of mp that have final + life or phoenix. Some of Emerald's attacks drain your mp, which will prevent you from being able to use Life or Phoenix.