I Should Be So Unlucky

Talk to Meow Meow at 6, -16. He'll tell you a story, and give you a "Dubious Bag of Kamas".

Go to 6, -18 and talk to Deudoine. He'll turn your bag of kamas into a "Rudimentary Sword".

Go to 4, -18 and talk to Dragonsly. He'll take your "Rudimentary Sword" and replace it with a "Rudimentary Fire Sword".

Return to 6, -16 and talk to Meow Meow again. He'll engrave Ecaflip's hallmark onto the sword. Quest complete.

Reward: 1 Yingnitiate sword, 200xp

Oddly enough, the sword you end up with does Neutral damage, despite it starting out as a fire sword. Ecaflip acts in strange ways, I guess.