Chasme A chasme ( pronounced KAZ - mee or CHAZ - mee ) , sometimes called a fly demon , was a type of tanar ' ri demon found in the Abyss . Chasmes were horrid and disgusting hybrids of flies and humans who sucked blood and enjoyed tormenting and torturing their victims . The droning of their wings could lull an unwary being to sleep , who might awake to find themselves being fed upon and tortured . Chasmes often served greater demons as interrogators , taskmasters , or torturers , or in capturing runaways and deserters of the Blood War . Description . Frightful , wretched , and disgusting in appearance , a chasme resembled a terrible demonic cross between a fly and a human . With the body of a giant fly , it bore two sets of large , buzzing wings and carried six limbs , the two forelimbs resembling long , slender human arms with long - fingered hands , the other four being hooked insectoid limbs . Emerging from its thorax , it had a head vaguely like that of a human , but ugly and exaggerated , with a tiny mouth , compound eyes , and a large horn - like nose . This nose was hard , sharp , hooked , and could bite and suck blood . Its maw contained black , bony ridges rather than teeth , and its tongue was hollow . Tufts of wiry hair sprouted from between the black plates that covered its thick , insectoid body . The chasme could walk upright or crawl upon walls and ceilings as they willed , and of course fly with excellent maneuverability . A chasme could grow to between 7 feet ( 2 . 1 meters ) and 9 feet ( 2 . 7 meters ) in length . However , as suited a flying creature , they were very light , weighing a mere 150 pounds ( 68 kilograms ) . When speaking , chasme had a rasping , buzzing voice , but typically preferred to communicate via telepathy . Their blood , when spilled , was black , though their other ichor was green and yellow . Hacked open , they deflated as if hollow . They tended to smell of corpses . Abilities . A chasme could beat its wings to make a droning buzzing sound that would lull unwary listeners to sleep . Those in close earshot had to its resist its drowsy effects , lest they fall into a deep sleep from which only vigorous shaking or being splashed with water could rouse them . Though once this lasted a number of hours , later chasmes could only make a victim sleep for up to two minutes , or even less time , ending when the victim shook it off . Otherwise , victims would awake to find a chasme sucking their blood . Similar to a " sleep " spell , this droning could affect any creature apart from fellow demons and those immune to sleep magic , such as elves . Even viewing the hideous chasme was a disturbing , terrifying experience . Formerly , anyone being touched by , or even catching sight of a chasme had to remain firm or else flee in horror for a few hours . Later chasme had to generate an aura of fear that affected those in the immediate vicinity , like a " fear " spell , causing them to flee for only a minute if they could not resist . After the Spellplague , they no longer had this power . A chasme ' s claws and other natural weapons dealt savage wounds that bled profusely and cumulatively with their number . The bleeding continued until the wounds were treated by a skilled healer or closed through some form of magical healing . Without such treatment , a victim would eventually die of blood loss . A chasme wielded an arsenal of innate magical powers . At will , they could cast " detect good " ( always active ) , " detect invisibility " or " see invisibility " ( always active ) , " insect plague " , " ray of enfeeblement " , and " telekinesis " , in addition to the spells common to all tanar ' ri demons : " darkness " , " infravision " ( before darkvision became inherent ) , and " teleport without error " or " greater teleport " ( itself and possessions only ) . Later chasmes added " contagion " , " desecrate " , " dispel magic " , " fly " , " protection from good " , and " wave of grief " , at will . Once a day , such later chasmes could also cast " unholy aura " and even " circle of nausea " . Some of them could even learn to throw their " ray of enfeeblement " with great swiftness , thrice a day . They could also use telepathy to communicate with creatures up to 100 feet ( 30 meters ) away . Post - Spellplague chasme lacked all these spells . A chasme that had the need could attempt to summon one or more other demons to its side . Earliest reports indicated a chasme losing a battle could summon one of its kind for aid , but only about 15 % of the time . Later reports estimated this success rate at 40 % . These more capable chasme could , thrice a day , " gate " in one fellow chasme , up to twenty mane s , or up to five cambion s . Later chasme did not have so much back - up , only able to summon one other chasme or up to four rutterkin s . Chasmes were strongly resistant to magic and like other tanar ' ri they were resistant to acid , cold , and flame , and immune to electricity and poison . They could shrug off blows from weapons not infused with goodness and purity or fashioned from cold iron . Personality . Chasmes were cunning but cowardly , and their keen focus on self - preservation gave them a subtlety and caution rarely seen in demons . However , they had a constant thirst for blood and pain , which they satisfied by torturing the weak . Chasmes loved to fight but immensely enjoyed torturing and punishing others . They possessed average to keen intelligence . Chasmes were expert in the techniques of punishment and torture , but also had a knack for deception and determining one ' s real motives . They practiced further in these areas , also becoming skilled at intimidation , gathering information , and even a little diplomacy . They could also be quite stealthy and good at noticing things and finding that which was hidden . They were also quite agile and good climbers . Combat . Enjoying a fight , a chasme was armed with two claws , a bite , and its nose - horn , with which it could gore a target , and all could cause bleeding wounds . It could use all these equally well . It could attack on the wing , diving upon foes , striking , and flying off again . They preferred to harass and torment their victims before finally killing them . Thus , chasmes used their speed and aerial maneuverability to maintain an advantage and their own safety at range . They flitted from victim to victim , attempting to inflict bleeding wounds on many foes at once . They also enjoyed assaulting their foes with their spells , typically favoring " contagion " , " insect plague " , " ray of enfeeblement " , " telekinesis " , and " wave of grief " . They saved " ray of enfeeblement " for foes in heavy armor or carrying a heavy load , so they might be overburdened if the spell sapped their strength . Against foes in light or little armor , they attacked with power . They typically began a fight using their droning ability to lull and knock out their victims , then kept it in reserve in case they were cornered or overwhelmed and had to flee , or to complete their victory , as they could do little else while they beat their wings in this manner . Society . Ecology . An adult chasme could spawn up to ten young each year , via pre - fertilized eggs that it laid in the rotting corpses of enormous demons or other creatures . However , some reports stated they emerged spontaneously from corpses lying in the Abyss . These eggs hatched after three months , producing larvae like fiendish maggots that crawled from the corpse and consumed the corruption that pervaded the Abyss . Other demons , particularly flyers , usually killed and devoured chasme larvae when they found them , so only the most clever survived . After a month , they metamorphosed into their adult forms and hatchlings grew to adulthood in seven years , though they could lay their own eggs after two . Chasmes were carnivorous , preferring to drain a sleeping victim ' s blood via their horn - like proboscises . Although they could operate over any kind of land or underground , chasmes favored lairs against vertical surfaces with many ledges to roost upon . These included cliff - face rookeries , vast caverns , and treetops . They were common in the Abyss , and especially prevalent on the layers of the Crushing Plain and Torremor , once home of Pazuzu , the demon lord of all evil things that flew . Preferring the company of their own kind to other demons , chasmes often gathered into gangs of around three to ten members . Activities . Like other demons , chasmes sought to cause mayhem , ruination , and suffering , but they spared the time to acquire power and knowledge before they would act . Left to their own devices , gangs of chasmes flew over the layers of Abyss , endlessly hunting for things to torture and torment , hopefully things weaker than themselves . They would set aside their hatred of other demons for the chance to serve greater demons , even demon lord s , as interrogators , taskmasters , or torturers . In this role , they kept slaves and lesser demons repressed and obedient through the application of punishment and intimidation , which they greatly enjoyed . Thus , chasmes sometimes acquired positions of influence and power in the Abyss . They pressured other beings into helping or serving them through deceit , manipulation , threats , or torture . For this reason , they preferred allies who were strong but dull - witted , and so were often accompanied by brutish demons . Chasmes had a particular knack for spotting demons that had fled their masters or deserted the Blood War . It was unknown exactly how they did this ; some speculated they had a psychic ability to sense the thoughts and emotions of tanar ' ri , perhaps even other , non - tanar ' ri . Chasmes went to great lengths to recapture runaway demons and bring them back to their masters , so that they might receive a reward and the opportunity to further torture the wretch . They also roamed the layers of the Abyss , hunting for Blood War deserters , and punishing them with a slow and agonizing demise . For this service , they avoided front - line duties in combat formations , and their places were filled by other tanar ' ri , which earned no love for the chasmes . In a few cases , chasmes claimed some small pocket of land on the Abyss or another plane and set themselves up as petty demon princes in miniature . These princelings ruled over minor demons like dretch es and rutterkin s . Relations . Chasmes bitterly hated most other demons . They did not like vrock s , viewing them as rivals . They nursed a traditional hatred of succubi , and would kill them given the chance . More powerful demons , like glabrezu and hezrou s , they feared and obeyed . Lesser demons , like dretch es and rutterkin s , they ruled over if they had the opportunity . Chasmes were in turn utterly detested by other tanar ' ri , thanks to their role in recruiting for the Blood War while avoiding it themselves . As a result , tanar ' ri often attacked chasmes on sight , with only the chasmes own strength and the support of the demons they served protecting them . Chasme were also known to serve the Faerûnian goddess Talona , Mistress of Disease . They were among the creatures of filth and mayhem she sent as help to her followers , as a sign of her approval , or as an agent of her wrath . Possessions . Although they carried no treasure , and bore no weapons or armor , chasme occasionally made use of magical item s that they came across . They also enjoyed delicate artworks studded with gemstones . Uses . The wings of chasme were sometimes harvested for use in " potions of flying " . History . The nalfeshnee demon Drallith " the Poxed " drove a golden chariot pulled by chained chasme . Drallith and his chasme steeds were members of the Scaled Horde that overran Impiltur in the Year of the Dowager Lady , 726 DR . Drallith was defeated in the Triad Crusade of 729 – 732 DR . The extraplanar monster Imgig Zu acquired a number of chasme minions , as well as other monsters . In the Year of the Prince , 1357 DR , Imgig Zu erected a magical tower a day ' s ride north of Waterdeep , and sent his chasme to seek out and kidnap magic - user s in the area . Bursting into a house , the chasme assaulted four elven women , who feared their drowsy drone . The chasme carried away Jalma and two other elf women , but failed to capture Cybriana , who escaped and was rescued by Timoth Eyesbright and Onyx the Invincible , who slew three of the chasme . For their failure and deaths , and for daring to beg for forgiveness , Imgig Zu killed the chasme leader via " flesh to stone " and " rock to mud " . Some days later , the chasme were pursuing two more elven women when Cybriana , Timoth , Onyx , Vajra Valmeyjar , and Priam Agrivar heard their buzzing and came to the rescue . Wary of their awful droning , the companions slew the last of Imgig ' s chasme . In the Year of the Wave , 1364 DR , two chasme were among the horde of fiends that the balor Errtu unleashed against Drizzt Do ' Urden , Catti - brie , Bruenor Battlehammer , Regis , and Stumpet Rakingclaw as they approached Cryshal - Tirith in Icewind Dale . One inflicted a bleeding wound on Catti - brie , before Bruenor hacked it apart with his axe . Drizzt ' s panther companion Guenhwyvar pounced on the other and brought it down out of the sky . These chasme had been to the Prime Material Plane before . In the Year of Rogue Dragons , 1373 DR , Danifae Yauntyrr , a priestess of Lolth , summoned a massive chasme known as Vakuul and asked it to carry herself and the draegloth Jeggred across the Demonweb Pits . It demanded payment , and Danifae seduced it by grasping its horn and promised the drooling thing pleasure . However , when the journey was done , she betrayed Vakuul and ordered her draegloth to kill the chasme . Jeggred tore Vakuul ' s forearms off before it escaped cursing back to its home plane . On Mirtul 23 of 1373 DR , Phourkyn One - Eye summoned a chasme to kill members of a cabal of wizard s in Thentia studying the " Dracorage mythal " causing the current Rage of Dragons . Ultimately , the avariel Taegan Nightwind , the faerie dragon Jivex , and the surviving wizards defeated Phourkyn and the chasme . In 1485 – 1486 DR , chasme were among the demons that walked the streets of Menzoberranzan and were later sent to aid in the ( failed ) defense of Q ' Xorlarrin against the dwarves .