1) There is no hidden 11th item currently.
2) There is no passion challenge as well currently
3) it's Roselyn's Echo Quest Make her wear the "Feline" Custume that is found in Halloween quest and talk to her she will tell u to bring her a silk web that is found on Haunted Woods (Purple Boundary) there will be a cave there enter it and don't get caught by spider girls. Interact with the shining web in the spider web and talk to her again