One horror story could be about a mage who misused the Cloud of Daggers spell. He cast it in a crowded marketplace, thinking he could control it. But the daggers started to fly randomly, stabbing innocent people. The screams and chaos that ensued were terrifying, and the mage was unable to stop the spell until it had claimed many lives.
Sure. A story could be that a young apprentice accidentally summoned a Cloud of Daggers during his practice. He was alone in the cellar of the wizard's tower. The daggers whirled around him menacingly. He tried to dispel it but couldn't remember the correct incantation. As the daggers got closer and closer, his fear grew until he thought he was going to die.
One famous dagger in fiction is Sting from 'The Lord of the Rings'. It was a small Elvish dagger that glowed blue in the presence of Orcs. Another is the Dagger of Time from 'Prince of Persia'. It allowed the protagonist to manipulate time, which was crucial in his adventures. Also, the Crocodile Dagger in the 'Assassin's Creed' series is quite well - known, often used by assassins in their stealthy kills.
A possible back story could be that the Warforged was created as a tool for a powerful wizard. Over time, it absorbed magical knowledge from its master. After the wizard's untimely death, the Warforged, now free, decided to continue the study of magic on its own, using the knowledge it had gained. It wandered the land, seeking more magical secrets and ways to improve its skills.
Once in a DND 5E game on Reddit, a player's character, a clumsy wizard, tried to cast a simple spell to light a torch. But instead of the torch, he set his own robes on fire. It was hilarious as he ran around panicking while the other players just watched in shock and then burst out laughing.
There was a story where a rogue player on Reddit was trying to steal from a powerful mage. He thought he was being so sneaky, but he accidentally stepped on a magical rune that made his shoes sing every time he took a step. It was really funny as he tried to run away from the mage while his shoes were singing 'La - la - la' loudly.
In one of our adventures in Waterdeep for Dragon Heist, our group of adventurers got into a tavern brawl. The wizard accidentally cast a spell that made everyone's hair stand on end. We all looked like porcupines. It was so funny that even the angry tavern patrons couldn't help but laugh. And instead of fighting more, we all ended up having a drink together.
During a mission in Waterdeep for Dragon Heist, our cleric was supposed to heal a sick person. But instead, he misread the spell and made the person's nose grow really long, like Pinocchio. It caused chaos in the town square as everyone was trying to figure out what happened. We had to run away from the angry mob while still laughing at the cleric's mistake.
I'm not sure specifically as there could be many different interpretations in a RWBY fanfiction. It might involve characters using masks and daggers in various adventures, battles, or secret missions within the RWBY universe.
The Sting from 'The Lord of the Rings' is very iconic. Its blue glow made it stand out and it was a key weapon for Frodo and his companions. Another is the Dagger of Time from 'Prince of Persia'. The ability to reverse time with it made it super cool and memorable. And the dagger used by Ezio in 'Assassin's Creed II' is also iconic. It was part of his assassin's toolkit and he used it to silently take out his enemies.