The power to possess stingers. Variation of Natural Weaponry.
The user possesses/uses natural or artificial poisonous stingers and may even be able to fire them out like bullets.
Suì-Fēng (Bleach) with her stinger Zanpakuto, Suzumebachi.
The stinger of the Glarghk Guhl Kashmas'nik demon (Buffy the Vampire Slayer) secretes a poison that induces extremely vivid hallucinations...
...extending their demon's stinger.
A Thorn demon (Charmed) spits stingers/thorns.
Zygons (Doctor Who) have venomous stingers on their palms and tongues.
Frost (Dragon Ball Super) has poisonous stingers in his wrists, one that makes opponents drowsy, and one with acidic poison...
...and later modified his tail to have a stinger.
After his death/rebirth as the Other, Peter Parker/Spider-Man (Marvel Comics) discovered he could produce and extend spider-like stingers from his wrists.
Scarlet Spider/Kaine (Marvel Comics) with stingers extended.
Shathra (Marvel Comics) has razor-sharp claws that cut most conventional materials including flesh, bone, stone, and some metals...
... she can also fire sharp stinger-like projectiles with great accuracy and speed.
Lorna Templeton (Mutant X) possessed a lethal scorpion mutation.
Wraiths (Supernatural) possess a retractable wrist spike used to feed on a human's brain fluids.
Jefferson Starships (Supernatural) are the hybrids of several monsters including the Wraith and therefore possess some of their traits including the retractable spike.
Scarlet Spider (Ultimate Spider-Man) possesses twin stingers in his wrists that can penetrate steel.
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SCP-058 - Heart of Darkness (SCP Foundation) has a Scorpion’s stinger tail behind him.