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"[[http://en.wikisource.org/wiki/Red_Nails Red Nails]]" is a Literature/ConanTheBarbarian novella by Creator/RobertEHoward, the last Conan story he ever wrote. Published in 3 parts, from July to October, 1936. [[http://www.gutenberg.org/ebooks/32759 It can be read online]] at Project Gutenberg.

[[InMediasRes After escaping]] from his previous employer, Conan finds himself lost in a seemingly endless jungle. He runs into his friend and ally [[PirateGirl Valeria]], only for the two to be immediately attacked by a large [[DinosaursAreDragons dragon]]. Stranding them on a rocky outcrop, they see a field stretching out from the jungle, and further still, a domed city far away in the distance. Stabbing the dragon with a poisoned spear, they make a break for the clearing, eventually arriving at the city gates after a full days travel.

They find the city to be seemingly deserted, made up of a endless maze of emerald green alcoves and hallways, lighted by flaming rubies. After much exploring, they stumble upon a terrified individual, and are immediately set upon by attackers using [[ArtifactOfDoom mysterious artifacts]]. After saving the man, he introduces himself as Techotl, and hurriedly brings them to his people, as [[NothingIsScarier there are things which hide in the dark hallways]].

The leaders of his people, Olmec and Tascela, tell them the tale of their people; how their people separated into three factions centuries ago and have been waging war ever since, how barely more than fifty of them still live, and how one of the factions was killed off, its leader Tolkemec gone mad to live in the catacombs beneath the city. Behind their throne sits a black pillar covered in red nails, each representing a slain enemy. They offer to help Conan and Valeria escape if they help them slay the last remaining members of their enemies, which they begrudgingly agree to.

After repelling a surprise attack from their enemies, Olmec declares the war over, their enemies all dead. He commands Conan and several of his men to go check the enemy base for survivors. Whilst there, Conan is betrayed by Techotl, who says he was told to kill Conan so Olmec could have Valeria as his [[SexSlave slave]]. Olmec tries to take Valeria, but as she repels him, Tascela arrives and takes her for her own, leaving Olmec to die on a torture rack. Conan arrives just in time as Valeria is about to be sacrificed to [[OurVampiresAreDifferent Tascela's hunger]].

Suddenly, from out of the darkness, [[OutsideContextProblem Tolkemec]] appears and proceeds to [[FrickingLaserBeams shoot]] everyone in sight with his [[BoomStick magic wand]]. Conan narrowly defeats the mad wizard, and Valeria [[KarmicDeath kills]] Tascela. The two of them embrace, and proceed to leave the now dead city.

Howard was suffering from many real world problems when he wrote ''Red Nails'', such as a messy break up with his then girlfriend and his mother's failing health putting an emotional strain on him, as well as an ongoing battle with depression and financial ruin, which may explain the more visceral nature and downer ending as compare to some of his other Conan tales.

Creator/MarvelComics adapted the story in comic book form in issues 2 and 3 of the ''Savage Tales of Conan the Barbarian'', with art by Barry Windsor-Smith. An animated-adaptation has been in DevelopmentHell for years.
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!!Tropes included
* ActionGirl: Valeria.
* CycleOfRevenge: The people of Xotalanca and Tecuhltli have been at war longer than any of the combatants have been alive, and they have no idea how to stop it anymore.
* DesignatedGirlFight: In the final battle, Valeria is the one who kills the villainess.
* DinosaursAreDragons: A Stegosaurus (at least in the comic version; in the story it's unclear). [[ArtisticLicensePaleontology A carnivorous one yet]].
* FamedInStory: Valeria "of the Red Brotherhood, whose deeds are celebrated in song and ballad wherever seafarers gather."
* InTheBack: Conan forgets the need to protect against this.
* JackBauerInterrogationTechnique: When Valeria awakens to find a serving girl attempting to drug her, she beats the girl to find out why.
* LiquidAssets: Tascela does this.
* PirateGirl: Valeria.
* PsychoLesbian: Tascela shows signs of being one of these.
* PuzzleBoss: Conan figures out (after many zapped natives perish) that Tolkemec's wand can only hit things caught between it and any mirrors in the room.
* RecycledPremise: The plot, which sees Conan and a female companion come across a mostly-deserted city that is being destroyed from within, bears some similarities to the earlier "Literature/XuthalOfTheDusk."
* RemembertheNewGuy: Valeria is presented as being an acquaintance of Conan's from previous adventures, but these adventures are not mentioned or shown in any previous stories.
* SuperPersistentPredator: The dragon/dinosaur.
* TechnicolorFire: Actually, it's the smoke that's green.
* TheyHaveTheScent: The dinosaur.
* VainSorceress: Tascela.
* WasOnceAMan: Tolkemec.
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