This quest is contained within Poetry's area on Salusa. Take the ornithopter to the sardaukar city, then head south, east. A sign near the entrance gives directions to Fang within the complex. Fang will tell you (hang out in his room a while) that he is missing a weapon. Search the complex for the weapon and return it to him to complete the quest.
Head to the fireplace in the Pub.
pull stone and push the button, go south and kill the ants. search rocks: you get the chest handle.
Go to the attic of the Sports Center.
attach handle to chest: you get the sword, look at inscription.
Return to Fang.
say I found the sword