Lhusu Mines The Lhusu Mines is a location in Ivalice in the world of " Final Fantasy XII " . It is located in Bhujerba , which resides on the sky continent of Dorstonis , and among its interesting features is that , as it is located on a sky continent , the deeper one gets into the mines the lighter it gets . Normally the mines are protected by a paling , however , during the game the paling has fallen and monsters have invaded the site . It can be speculated the paling has been allowed to fall deliberately , as to prevent the Empire from obtaining more magicite . When the party ventures into the mines to rescue Penelo , the enemies ' level s are 7 - 13 . But as the player gets further and goes after the mark , Antlion , and receives the key , the enemies ' levels are 38 - 43 . If the player uses the Site 11 key to unlock the gate , they get the option to venture into the deepest part of the mines where the enemies ' levels rise to 59 - 64 . Location . The Lhusu Mines can be ventured in from the Skycity of Bhujerba in Lhusu square . Treasures . Knot of Rust is the most common treasure in the mines , all treasures being able to give one . Motes are the other common treasures . With the Diamond Armlet equipped there is a small chance of obtaining an Elixir or Hi - Ether from the treasures instead . During the player ' s first visit , there can be a treasure in Transitway 1 that may contain a Killer Bow . In Site 2 area , before the spot where Rocktoise is fought , there can be a treasure that may have the Assassin ' s Dagger . Later , when the Antlion hunt becomes available , the player can venture deeper into the mines . In Site 9 , behind the minecart , the player may find a Morning Star , a powerful weapon to obtain early . At the deepest end , in the cave where Antlion is fought , the player may find the game ' s ultimate gun , Fomalhaut , and since the treasure respawns it is possible to to obtain multiple Fomalhauts . Deeper into the mines still , with the Site 11 Key the player can go to the deepest reaches of the mines , where Gilgamesh is fought . Treasures here are either Knots of Rust , Motes , or Ethers . The northernmost area where the player must cross through a hidden passage has a treasure that has 50 % chance to spawn , but when it does , it will always be the Aegis Shield . Once the treasure has been claimed , it will never respawn . The dead - end on the northeast side of the Site 6 South area can have the armor Maximillian , and this treasure also respawns . Oltam Span . These chests only appear in the " International Zodiac Job System " version . Lasche Span . This chest only appears in the " International Zodiac Job System " version . It does not respawn . Staging Area . This chest only appears in the " International Zodiac Job System " version . It does not respawn . Site 7 . This chest only appears in the " International Zodiac Job System " version . It does not respawn . Site 11 . To obtain the key to open the gate to the deepest reaches of the mines , the player must first complete the hunt for Antlion . Afterward , the Site 11 Key can be found in Phon Coast Hunters ' Camp , next to a fallen Bhujerban . Story . Like the Henne Mines , Lhusu Mines is a magicite mine . It is located near the city of Bhujerba , and previously was a major source of magicite for the Archadian Empire . During the time of the events of " Final Fantasy XII " Lhusu Mines is still providing the Empire ' s Draklor Laboratory with magicite , but it ' s done in secret ; a venture led by Dr . Cid and funded by Vayne Solidor . Judge Ghis has come to Bhujerba to talk to Marquis Ondore about the affairs , and the two venture into the mines . Vaan , Balthier , Fran , and Basch also head into the mines to rescue Penelo , whom Ba ' Gamnan is holding hostage . Larsa joins them as well , using the alias " Lamont " , wanting to see if the rumors are true about Bhujerba providing Draklor with magicite in order to create manufacted nethicite . Penelo is being used as bait for a trap set by several bangaa to capture Balthier , but once Balthier and friends set foot in the mine the bangaa deem her worthless and let her go . The party find their way to the depths of the mine without finding Penelo . " Lamont " finds shards of magicite and his suspicions are confirmed . Balthier questions him about this and realizes " Lamont ' s " true identity , but before he can squeeze answers out of him Ba ' Gamnan and his gang interrupt them . Larsa runs out of the mines telling the others to follow , and Balthier and his friends have the chance to either fight Ba ' Gamnan or follow Larsa . The freed Penelo runs through the mines and bumps into Ghis and the Marquis . Ghis is furious having found a civilian in the mines that houses Empire ' s secrets , but Larsa steps on the scene and rescues her , taking her away with him . After Vaan and his friends find out where Penelo has gone they follow . Later the prty can return to the mines to fight several marks , including the legendary Gilgamesh . Quests . Site 11 Key . To get deeper into the mines the player must complete the hunt for Antlion , after which the Site 11 Key appears in the Hunters ' Camp in Phon Coast , on the ground next to a Fallen Bhujerban . Hunts . The Nidhogg is the fifth mark to be listed in the Clan Primer aand arguably the toughest Rank I Mark . The hunt becomes available after Vaan has masqueraded as Basch in Bhujerba , and the party has been given permission to enter Marquis Ondore ' s estate . Nidhogg is found in the Transitway 1 area of the Lhusu Mines , and the petitioner is conveniently located right at the mines ' entrance . The player will also receive a Great Serpentskin after the battle , which can be given to Dantro ' s wife in Dalmasca Estersand as part of the " patient in the desert " sidequest . Diabolos is a Rank VII Mark found in the Site 11 area of the Lhusu Mines . The hunt becomes available after the events in Giruvegan . The hunt is petitioned by Miclio in Bhujerba . Rocktoise is an Elite Mark whose hunt can be undertaken after the player returns to Rabanastre after escaping from Barheim Passage . Rocktoise was originally a small pet named Carbo , owned by a moogle named Pilika who works in the moogle - operated Technick shop in Bhujerba . Pilika had also kept a snake named Bianca , which still lingers within the shop . The Antlion is an Elite Mark whose hunt becomes available upon reaching Mt Bur - Omisace , so if the player wishes to fight it with Larsa in the party , they should return to Rabanastre upon reaching the mountain to accept the hunt , because Larsa will leave the party if the player proceeds further in the story . Antlion can be found in the Site 9 area of the Lhusu Mines and is petitioned by Niray in Bhujerba / Staras Residence . Gilgamesh is found in the Lhusu Mines and is fought twice . The first is on the bridge just to the west of the Gate Crystal , in a homage to the " Clash on the Big Bridge " ( which is also the name of the hunt ) from " Final Fantasy V " ; a reworked version of the iconic theme plays during both fights . Gilgamesh escapes after defeat and the player must find the Site 11 Key and venture deep into the mine to Site 7 . During the second fight Gilgamesh ' s HP is triple what he previously had , and his stats are raised . Rare Game . Gemhorn shows up in the southwestern most part of Site 11 after the player has defeated all foes in the area , including the mimic " treasure chests . " There is a 20 % chance Aerieel will spawn in the Oltam Span . There is a 20 % chance that Bombshell will appear in the Lasche Span , so one may hunt the creature by exiting and reentering the area until it spawns . One of the items the Bombshell drops is the rare weapon Yagyu Darkblade , the strongest ninja sword with an attack of 80 . To find Disma the player must have spoken to the " Huntmaster " in Phon Coast and defeated Thalassinon , which will trigger the start of the Rare Game quest . Disma is found in either Site 5 or Site 6 South . It has a 5 % chance of replacing a Dark Lord in the area . Once it has been felled , it will never respawn . Disma is one of the toughest monsters in the game . Enemies . Shaft Entry . On the way to rescue Penelo The rest of the game Oltam Span . On the way to rescue Penelo Rest of the game Transit Way 1 . On the way to rescue Penelo Until Antlion Hunt Shunia Twinspan . On the way to rescue Penelo Until the Antlion hunt Site 2 . On the way to rescue Penelo Until the Antlion Hunt Other appearances . " Final Fantasy Record Keeper " . The party heads for the Lhusu Mines to rescue Penelo , who has been taken prisoner by Ba ' Gamnan and his cronies . Musical themes . The background music for the entirety of the Lhusu Mines is " The Stone ' s Secret " .