Emerald Weapon Emerald Weapon is a superboss in the North American , PAL and International versions of " Final Fantasy VII " , and one of the toughest of the five Weapon s ( the others are Ultimate , Diamond , Ruby , and the non - battled Sapphire ) . Emerald Weapon is released when Sephiroth summons Meteor ; Weapons are awakened when the Planet is under grave threat , to work as its protectors . Emerald Weapon is one of the two superbosses in the game , along with Ruby Weapon . Emerald Weapon is located at the Bottom of the Sea , accessible by the submarine . A battle will ensue after making physical contact , although it is possible to avoid him by piloting the sub at its maximum height . Defeating Emerald Weapon in the PC version re - release of " Final Fantasy VII " unlocks the Emerald Weapon achievement . Doing so in the PlayStation 4 version earns the Emerald Eviscerator trophy . Battle . The player will have 20 minutes to complete the battle unless they have the Underwater Materia equipped . With one million HP , Emerald might take less time to defeat than Ruby because of its lower Defense and Magic Defense , but will probably take longer than 20 minutes . One of the things that makes Emerald Weapon a dangerous opponent is its Aire Tam Storm attack ( " Aire Tam " is " Materia " spelled backwards ) . The attack deals damage to each character equal to the amount of Materia equipped on them multiplied by 1 , 111 . As such , having nine Materia or more equipped on a character means certain death . It is possible to manipulate the characters ' Materia configuration as to get All Lucky 7s if a character only has two Materia equipped and 9999 HP when Aire Tam Storm hits . Emerald , unlike Ruby , follows a specific attack pattern . After using a random number of Emerald Shots , which deal a few thousand damage to each of their targets , it uses a physical attack , hitting the party for thousands of damage . It will then use Emerald Shoot and Emerald Beam , and revive its eyes . These are different entities from Emerald entirely , unlike Ruby ' s tentacles , and use magical attacks that hit for thousands of damage to either HP or MP . If one is to attack Emerald ' s main body at this point in a way that is not a Limit Break or a Bahamut summon , it retaliates with Revenge Stamp , which is similar to its physical attack . Destroying the eyes prevents Revenge Stamp and restarts the pattern , but otherwise Emerald simply casts Emerald Beam again and then uses Aire Tam Storm . He then alternates between the Beam and Aire Tam Storm until either dying , or having its eyes destroyed . After using Revenge Stamp ten times , Emerald Weapon will use Emerald Beam and Emerald Shoot both half as often , and after reaching Aire Tam Storm , will use it over and over again . Emerald Weapon also uses Aire Tam Storm as a counterattack to Knights of the Round , so although the knights will destroy the eyes , summoning them will not prevent Aire Tam Storm . Strategy . Maxing out the party ' s stats with Guard Sources and Mind Sources will render many of Emerald Weapon ' s attacks , save Aire Tam and Emerald Beam , harmless . Hero Drinks can be used to boost the party ' s stats mid - battle . If the player has a mastered Phoenix Materia paired with a mastered Final Attack Materia , the character will come back to life five times in total when killed if they have enough MP to summon it . If the player is using high level characters with their level four Limit Breaks unlocked , and the Knights of the Round Materia with W - Summon , the player will likely not need to use the Underwater Materia . The All Lucky 7s status , if not used when the eyes are present , will deal 489 , 951 damage in total to Emerald Weapon , just under half its HP . Triggering the status for the battle is not easy , however . One method is to have 9999 HP while being hit with Aire Tam Storm while having two Materia equipped , resulting in 2222 HP damage and All Lucky 7s . Another way is to use Chocobuckle . Chocobuckle always does a set amount of damage based on a formula surrounding how many times the player has run away . That , along with a character ' s Max HP , is a factor the player can control . The player must make sure at least one of the characters ' Max HP is equal to 7777 + the amount of damage done by a Chocobuckle . The player can then Chocobuckle that character . For an easy way to beat Emerald Weapon , the player can have a character equip HP Absorb , Knights of the Round , Counter , Mime . With W - Summon and two stars on the Materia , they can summon it twice . The HP Absorb paired with Knights of the Round , and Command Counter paired with Mime , the player can cast Knights of the Round and when the character is attacked , they will counter with Knights of the Round while being healed . This makes the other party members unnecessary , however . Another effective strategy that requires almost no Materia , excessive grinding or preparation , is to use Fury and Level 3 Limit Breaks . The player should come with one character equipped with W - Item , one equipped with Underwater , and all three equipped with HP Plus so that they have 9999 HP . By exploiting the W - Item glitch , one should amass many Elixirs and Megalixirs , at least 20 of each , and put them on the top of the inventory , along with 12 Hero Drinks . All three characters should be in Fury status and have Level 3 Limits , as Lv4 limits take too long to prepare , and Limits need to come frequently for this strategy to work . Any other Materia is unnecessary , and Aire Tam Storm should rarely be used . The player should begin the battle by responding to every Emerald Shoot with an Elixir , while the characters buff up with Hero Drinks . A stomp attack should prompt a Megalixir . The player should keep at least one person ready to heal at all times , as the strategy is ruined if anyone gets KO ' ed . Once the eyes appear , the party should be at max health when they are hit by Emerald Beam . All three party members will likely hit their Limit Breaks , but one should select to use a Megalixir while Emerald Beam ' s animation is beginning , and the others should select their Limits . Since Limits take priority , they will override the Eyes ' attacks and hit first , likely killing a couple of Eyes before they can move . The Megalixir will heal , and the player should use the third Limit . If any Eyes persist , the player should wait for the second Emerald Beam and repeat , which should finish them before Aire Tam Storm hits , reverting Emerald to its previous phase . The party should resume with Hero Drinks and Elixirs until four have been used per character . As long as the player keeps their HP maxed , Emerald Beam will always prompt Limit Breaks due to it being a gravity attack , the eyes will never get many turns , and Emerald will never kill anyone . The best Limits to use are Cloud ' s Meteorain , Barret ' s Angermax , Tifa ' s moves up to Meteor Strike , Yuffie ' s Doom of the Living , Red XIII ' s Earth Rave , and Cid ' s Big Brawl or Dragon Dive . Glitches . There is a glitch that involves casting Ultima against Emerald Weapon with Quadra Magic , while the Ultima Materia is also linked to HP or MP Absorb . Casting Ultima with this setup may freeze the game . Emerald Weapon can be killed in one hit using the Overflow glitch with Vincent or Barret if their ultimate weapon is powerful enough . Emerald has one million HP , making Overflows to Emerald Weapon more powerful than any other attack in the game . Defeating Emerald Weapon when the timer hits zero causes a game over and victory at the same time . Other appearances . " Crisis Core - Final Fantasy VII - " . The still - frozen Emerald Weapon appears as an Easter egg , buried in Banora Underground . In the northern sections of the first area " Depths of Judgment " , Emerald Weapon ' s shoulders emerge from a large formation of crystal . The ridges and slots on the shoulders for Emerald ' s four orbs identify it , but the player is unable to move Zack or the camera in such a way as to see past the crystal . Emerald Weapon lies beyond the map borders , and the player cannot get any closer to it other than this distant view . The same Emerald Weapon sighting might be encountered on background in mission 9 - 6 - 6 , during the battle with superboss Minerva . According to the " Crisis Core Complete Guide " , the Banora mining site was closed when Shinra discovered Emerald Weapon in stasis underground , and the village was built to hide the discovery with Shinra staffing it with residents .