Binding Coil of Bahamut The Binding Coil of Bahamut is a raid in " Final Fantasy XIV : A Realm Reborn " , available after the first main storyline is completed . It is a series of five raids located below Castrum Occidens in Eastern La Noscea . At the time of " A Realm Reborn " initial launch , it was the most challenging content available . Initially , players could only enter a pre - made party into a turn the leader had not yet cleared , and if any member was further than the leader , entry was denied , and each turn could only be done in sequence . With Patch 2 . 2 and the début of the Second Coil of Bahamut , the Binding Coil can be accessed through Duty Finder and grants a fixed 20 % Echo bonus to all parties . Story . In the aftermath of the Battle of Carteneau , a fragment of Dalamud landed on an area on which a force from the Garlean Empire build the fortress Castrum Occidens on . After the declaration of the Seventh Astral Era , Alisaie Leveilleur recruits the adventurer to aid her in exploring the Binding Coil of Bahamut to discover the fate of Bahamut and her grandfather Louisoix , and to ensure Garlean forces do not obtain the Allagan technology Dalamud ' s still active defensive systems possess . As they travel past the Imperial Exploratory Outpost , they discover the severed , colossal wing of Bahamut embedded in corrupted crystal formations . They descend into a buried Ragnarok - class starship that jettisoned from Dalamud , using its drive cylinder as a makeshift elevator . At the bottom of a chasm they find the right hand of Bahamut , along with a fearsome dragon enslaved by the Allagans . Objectives . The Binding Coil is divided into five " turns " that act as independent instances . While parties originally had to do them in sequence , Patch 2 . 2 + enabled them to be done in any order . Turn 1 - Upper Aetheroacoustic Exploratory Site . Entering the passage leading inward , the party must battle a mid - boss , an ADS ( Automated Defense System ) of Dalamud . Throughout the fight , it will use High Voltage to paralyze the party , making it recommended to Silence the attack . During the battle , smaller Attack Drones will appear from behind and should be dealt with by an off - tank . Once the ADS is eliminated , progressing further leads to an open area . Several powerful Dark Matter creatures are found in this section . At two points , a Dark Matter Golem controls a barrier preventing further progress . These golems can use a dangerous Obliterate attack , which can be lethal to weaker party members . A cutscene appears at the final section , where an enormous snake called Caduceus attacks . The Caduceus progressively gains an attack boost , but this can countered by bringing Dark Matter Slimes to it . At 60 % health , it splits into two snakes , each having half the remaining health . Both must be slain quickly to avoid being overwhelmed by the remaining snake . Turn 2 - Lower Aetheroacoustic Exploratory Site . In this ziggurat - like turn , the party must eliminate defense nodes while making their way to the ADS . Defeating a certain node will prevent the ADS from using an ability , but will grant it a passive buff that enhances certain traits . The goal is to carve a path to the ADS and defeat nodes based on party setup ( left path for melee heavy groups , right path for magic heavy groups ) . The Quarantine Node in the southernmost room can be slain to disable the Allagan Rot , but doing so grants ADS a haste effect . To complete this turn , the ADS must be defeated in the center . Unless the Quarantine Node was eliminated , it will use Allagan Rot on a party member . This effect has an 18 second countdown , and must be passed by standing next to a party member to reset it before it severely damages the party with an explosion . An " infected " player cannot receive it again for 40 seconds after transfer , so the party must coordinate when to pass it . The ADS will slowly prepare an " enrage " mode after the instance starts , where upon it will repeatedly hit the party with Object199 . As this disables all other abilities ( including Rot ) , most players opt to let its time elapse and simply heal through Object199 barrage while performing an all - out attack . Turn 3 - The Ragnarok . Unlike other turns , there is no boss here . It is simply a gauntlet of jump pads that descend the hull of the starship . Throughout this turn several Dark Matter creatures are fought ( or avoided ) while heading to the exit . Turn 4 - Ragnarok Drive Cylinder . This turn is an elevator encounter . Rather than a singular boss , there are waves of clockwork creatures that must be fought . The most dangerous are the Clockwork Dreadnoughts , which hit hard and have more health than others . The waves consist of the following : Once all the machines are destroyed , the turn ends . Turn 5 - Ragnarok Central Core . The final and most difficult turn , Turn 5 , features the first superboss in " A Realm Reborn " : Twintania . Unlike the previous turns ( or most boss fights for that matter ) , the dragon must be fought through challenging set of phases . Even the most well - geared players can be overwhelmed by some of her attacks . Defeating the ancient dragon concludes the Binding Coil , and enables access to the Second Coil of Bahamut . Musical themes . The Binding Coil of Bahamut features musical themes based on " Answers ; " the main theme of the dungeon called " Primal Timbre " shifts between a quiet , atmospheric version or a more dramatic version with heavier instrumentation based on whether the party is in combat with monsters , and the dungeon ' s " boss " theme also uses strains from the song in certain sections , though it is less obviously based on it . The exception is Twintania , which plays " Thunderer " as its battle theme instead .