Cydaea

Cydaea, Maiden of Lust.

The Maiden of Lust (previously known as the Mistress of Pain) is a Diablo III Boss. She is a Demon type monster who resides in the Heart of Sin in Act III.

Diablo III Monster

Diablo III Monster [e]

Cydaea Boss
Classification:	Demons
Monster Family:	Bosses
Role:	Boss
Monster Stats Norm/Night/Hell/Inferno
Life:	Unknown
Mana:	Unknown
Armor:	Unknown
Resistance:	Unknown
Offence Norm/Night/Hell/Inferno
Armament:	Frontal Blades
DPS:	Unknown
Low Damage:	Unknown
High Damage:	Unknown
Range:	Melee & Ranged
Speed:	Unknown
Movement:	Unknown
Monster Modifiers
Unknown
Spells/Abilities
Explosive Projectiles Sticky Slick
Found In
Unknown

Concept art with notes.

The Mistress of Pain is a likely candidate to be a Boss type monster. Apart from having a title, a conceptual artwork depicting the Mistress of Pain lists several of her abilities - more than typical monsters have.

The Maiden of Lust is a demon with an upper body of a woman from the waist up and a body of a spider. She walks on six spider-like legs that appear to be made of soft flesh instead of the hard carapace found in spiders. The spider portion of her body also has a pair of bladed mandibles which are used for slashing attacks. Her upper body appears to be that of a beautiful human female but has claws on her hands and many sharp teeth. Her spider abdomen has large spinnerets that produce sticky silk which impedes player movement, as well as explosive projectiles that disperse in a cluster around the player.

Another artwork depicts her hanging by chains attached to her greaves, wearing dress-like attire and a serene expression. The significance of this has not been made clear.

Much like Azmodan, Cydaea will taunt the player as they decent the Tower of the Damned with her silky voice, descending from the ceiling into the player's view from a web. She is the "mother" of the succubus monster type and shows great affinity towards them.

Boss Abilities

Cydaea has a small handful of abilities, and the fight is more about attrition than all-out melee combat, as seen in a fight like Rakanoth or Izual. A basic melee attack is listed for her in the game's files, but she doesn't appear to use it. Her abilities are as follows:

Pain Bolts - The maiden will fire a handful of green projectiles imbued with poison damage at the hero for moderate damage.

Web Trap - Cydaea fires a projectile on the ground which produces a long-lasting web trap, which slows the movement speed of anyone caught in it by roughly eighty percent.

Spider Pits - Cydaea will fire a green projectile on the ground which erupts into a pool of green acid. Small spiders, low in damage and health but high in number, will continuously spawn from the pit. She often casts this before fleeing from the player.

Cydaea in-game.
Web trap.
Spider pit.
Pain bolts.

Background

Besides the fact that she originally was portrayed to live in something that looks like a sewer, hanging from chains with skulls dangling around her, in her pretty dress, nothing is really known about the Maiden of Lust. Seeing as she has a nice dress, it might be some corrupted human princess in ages back, who's still very aware of fashion, but no one can do anything besides speculate.

Lore

From Deckard Cain:

Though Azmodan is close to all of his lieutenants, Cydaea is his special favorite. The Maiden of Lust is both beautiful and grotesque in appearance, with the torso of a woman and the legs of a spider. Her voice is said to be as smooth as honey, but she only speaks words of death.

Development

The Mistress was originally only shown with the chains, and called the "Spider Queen" by the Diablo 3 community, but a few crumbles of information became available when the denoted concept art was released. The first work must have been on July 2003 or earlier, since concept art by Peter Lee is dated to this time. The Mistress of Pain was originally removed from the game over time constraints, but after a fan created a cosplay costume of her for BlizzCon, the development team decided she needed to be put back in. They then changed her name to the Maiden of Lust, and chose her as a lieutenant for Azmodan's army.

Media

You can find pictures in the Diablo 3 screenshot and picture gallery:

The Mistress is one of few new monsters that have received great attention by the Diablo 3 community. In this gallery, fan art is also included with the official art:

Notated concept art by Peter Lee.
The Mistress alone in some sort of cellar.
Wallpaper version of the notated concept. More chains...
Fan art by Kaeros[1]
Mistress of Pain 3D model by Delowyn.
The "Durance of Pain" by Delowyn.
Mistress of Pain Cosplay by Rainyia.
Render of the Maiden's model.

Boss and Champion Special Boss Modifiers
Uniques Modifiers	Strong CC (Limit 1): Knockback -- Nightmarish -- Vortex -- Jailer Defensive (Limit 1): Avenger(C) -- Health Link(C) -- Horde(B) -- Illusionist -- Missile Dampening(B) -- Shielding Aggressive (No Limit): Arcane Enchanted -- Desecrator -- Electrified -- Fast -- Fire Chains(C) -- Frozen Pulse* -- Frozen -- Molten -- Mortar -- Plagued -- Poison Enchanted* -- Reflects Damage -- Teleporter -- Waller (B) = Boss Only modifier. -- (C) = Champion Only modifier -- * = Reaper of Souls only
Removed Modifiers	Ballista -- Cold Aura -- Die Together -- Doppelganger -- Extra Health -- Invulnerable Minions(B) -- Life Link -- Magical -- Mirrored -- Multishot -- Mythical -- Powerful -- Stoneskin -- Vampiric
Key Quest Uniques and their Special Modifiers
Act One Uniques	Araneae - Web Spit	Leoric - Summon Skeleton, Teleport Strike, Triple Cleave		The Butcher - Smash, Grappling Hook, Spear, Frenzy Charge
Act Two Uniques	Maghda - Forcefield, Summoning Ritual, Punish, Moth Dust, Teleport.	Zoltan Kulle - Fiery Boulder, Time Bubble, Ceiling Collapse, Energy Twister,Vanish, Creepy Laugh		Belial - Phase One: Triple Fireball, Summon Vipers. Phase Two: Poison Meteors, Ground Pound, Lightning Strike, Lightning Breath.
Act Three Uniques	Ghom - Acid Slime, Sneeze, Gas Cloud, Chomp.	Siegebreaker - Triple Hit, Charge, Leg Stomp, Grab and Throw.	Cydaea - Pain Bolts, Web Trap, Spider Pits.	Azmodan - Bellyflop, Laser Attack, Falling Corpses, Demon Gate, Pool of Destruction, Globe of Annihilation.
Act Four Uniques	Rakanoth - Cleave, Teleport Strike, Blade Strike, Volley, Summon Minion.	Izual - Frost Nova, Frozen, Summon Minions.	Diablo - Phase One: Claw Rip, Charge, Hell Spikes, Shadow Vanish Grab, Curse of Destruction, Ring of Fire, Ground Stomp, Curse of Anguish, Curse of Hatred. Phase Two: Shadow Clone. Phase Three: Overdrive, Lightning Breath.