http://wiki.guildwars2.com/wiki/Mystic_Forge/Equipment#Backpieces
It only work for :
- Quiver of Swif Flight
- Book of Secrets
- Bowyer’s Delight
- Sights Be True
- Endless Quiver
- Koss on Koss
- Simon’s History of Ascalon
- Tome of Rubicon
Its the same recipe as show on the wiki, but replace the vial with bloodstone dust (i think its 250 each, but not sure)
Thaddeauz [xQCx]- QC GUILD