Barheim Passage The Barheim Passage is a location in the land of Ivalice in " Final Fantasy XII " . It is an underground passage that connects the Nalbina Dungeons to the Dalmasca Estersand . Long since abandoned , the passage now provides no real use . Originally it was a passage used to speedily bring goods into Nalbina Fortress , but fell into disuse with the advent of airships as the preferred form of transportation . Now , the only people who walk down its paths are people escaping from the Nalbina Dungeons . In order to get back to the passage later in the game , the player must complete the Patient in the Desert sidequest on Dalmasca Estersand . Location . The Barheim Passage is located just to the east of Rabanastre , south of the Nalbina Fortress . Treasures . Barheim Passage has numerous treasure chests , and some Mimics posing as treasures . The treasures the player encounters when going through Barheim Passage the first time with Basch as a guest are nothing special and contain either gil or common recovery items or low level equipment . The treasure at the far end of the Op Sector 37 has a 60 % chance to spawn and a 75 % chance to contain a Mage Masher . During the first time through , the best treasure is the Oaken Pole , which has a chance to appear at the far end of The Zeviah Subterrane area , on a little " island " where the player can cross if they " walk off the map " . The Oaken Pole treasure has a 85 % chance to spawn , with 85 % chance to contain an item , of which the Oaken Pole is selected half the time . Because the treasure respawns it is possible to get multiple Oaken Poles early , but as soon as the player exits Barheim Passage they can no longer return until later . If Barheim Passage is explored later with the Diamond Armlet equipped , all of the " early " item treasures are either Knots of Rust or Elixir ( 10 % chance ) . After obtaining the Barheim Key the player can explore areas that were sealed off previously . In the Special Op Sector 5 all treasures contain gil , and the area has the Rare Game Ithuno posing as a treasure from which the player can steal the Deathbringer one - handed sword . In East - West Bypass the furthest treasure chest in the dead - end bit can contain a Turtleshell Choker . The same treasure may contain a Bubble Belt when Diamond Armlet is equipped . In the Zeviah Span , the treasure right on the middle of the bridge can contain Celebrant ' s Miter , and the one at the south end can contain Cleric ' s Robes . Mostly the item treasures at the far end of the Barheim Passage are Knots of Rust , but the treasure that normally contains either 500 gil or an Elixir , can hold Zodiac Escutcheon with the Diamond Armlet , although the chance is small . The player can also obtain the Dragon Mail from a treasure in West Annex , near the area where the path starts to narrow . The treasure in Terminus No . 7 Adjunct contains either 20 , 000 gil or the Kaiser Shield with Diamond Armlet equipped , but is a treasure that will never respawn . Terminus No . 7 Adjunct . This chest does not respawn . Terminus No . 7 . Chests in this location only in appear in the " International Zodiac Job System " version . Neither respawn . Story . After having been found trespassing in the Royal Palace of Rabanastre , Vaan and his two sky pirate comrades Balthier and Fran are sent to Nalbina Dungeons . Fran , being a viera , senses a way out . Turns out the " way out " is a pit at the deep end of the dungeons , and there they also find Basch fon Ronsenburg , who has been kept in a private cage . The party free Basch and knock his cage down the pit , collapsing the tunnel , and ending up in the Barheim Passage . With Basch as a guest the party make their way out of the passage fighting mimics and finally the Mimic Queen . At the end of the battle the Mimic Queen explodes sealing the entrance to the passage . Later , if the party obtains the Barheim Key , the party can come back to explore the passage , through an alternative entrance . The manga version of " Final Fantasy XII " expands on the events with Vaan tells Basch Reks was interrogated as a co - conspirator on Raminas ' s murder , and died from the methods used to force a confession . The four flee down the passage from a Mimic Queen , Basch grabbing the sword of a fallen adventurer to fight . Vaan distracts the Mimic Queen while Basch cleaves it in two , but they disturb a nest of smaller Mimics . Basch fights them off to protect Vaan , the two speaking of Reks ' s belief in Basch and the true events of Raminas ' s death during the battle . With the Mimics dead the group escapes into the Dalmasca Estersand , and Basch heads to Rabanastre , telling Vaan he will accept atonement at his hands after he is finished what he needs to do . Quests . Electricity and Mimics . Speak to Burrough to discover that the fuse had blown and needed to be replaced . He happens to have a fuse which he then gives to the party . Replacing the fuse opens the gate , but causes the power level to drop to 70 % . After that he explains that as long as the lights are on the Passage is not very dangerous , but if the power level drops below 30 % , " fierce beasts start comin ' out in the dark " . For the duration of the level , if the power level drops below 50 % , Zombies and Skeletons appear . If it drops below 30 % , Specters and Skull Defender s appear . There is also a chance that a Battery Mimic will respawn between 31 - 50 % . Periodically , the party will find Battery Mimics to stop them from feeding on power conduits and draining the electricity over time . As long as a Battery Mimic lives in the current area , the power will continue to slowly drop . When a Battery Mimic is killed , some of the power they consumed will be restored . After defeating the Mimic Queen , the Battery Mimics no longer appear . Hunts . The Bloodwing is a Rank V Mark whose hunt becomes available after felling Judge Bergan at Mt Bur - Omisace . Bloodwing is found in the West Annex area of Barheim Passage . It attacked two escaping prisoners , one being fatally wounded . The other prisoner petitions the mark to avenge his friend . Its petitioner is No . 381 found in Dalmasca Estersand South Bank Village . Rare Game . The Minibug is found in the East - West Bypass area in the corner in the east end . It has a 20 % chance of appearing , but is said to be higher when Ithuno , another Rare Game , is in Special Ops Sector 5 . Unlike Ithuno and Mimics in general , Minibug is not disguised as a treasure chest , making it easy to spot . Ithuno has a 20 % chance of spawning for every entry into Special Ops Sector 5 and will be disguised as a treasure chest near the end of the area , behind a big rock on the train tracks ( near one of the Surianders and after the Adamantitan ) . If a chest appears there , one will know it is Ithuno if the bottom section of it is purple and the chest itself is silver ( other chests in the area are green ) . The Deathbringer sword can be stolen from it , one of the best weapons early on . It ' s possible to get more than one if the player keeps spawning Ithuno . To find Ishteen the player must have spoken to the " Huntmaster " in Phon Coast and defeated Thalassinon , which will trigger the start of the Rare Game quest . Ishteen then appears in The Zeviah Span and East - West Bypass . Its odds of appearing in these two areas increases by 2 % every ten seconds the party spends there . The odds will hit 100 % after roughly eight and a half minutes . It will appear right next to the party . Like all Trophy Game it will never respawn once killed . It is actually possible to zone back and forth between the two zones , and make it appear in both , stealing one rare Soul of Thamasa from each . Zalera . The western mines of the Barheim Passage is the sealing place of the optional Esper Zalera . After Zalera ' s defeat , passage to the Garamsythe Waterway is opened . To reach this part of the passage the player must complete the " Patient In The Desert " sidequest at the Dalmasca Estersand . Gilgamesh . Gilgamesh can be found in the Barheim Passage at Zeviah Span area during the Matamune Rod side quest . He won ' t fight the party , only hands over a fishing rod . Shop . The items available for purchase change throughout the game . The best items are available after the Pharos . Burrough . Consult the Armor , Accessories , and Magick articles for more information on these items . Burrough will be selling some of the game ' s best wares after the events in Pharos . Musical themes . The track that plays in the Barheim Passage is the aptly named " The Barheim Passage " . Other appearances . " Final Fantasy Record Keeper " . The cage lands in the Barheim Passage , a monster - infested network of tunnels . Basch joins the party as they make their way back to the surface .