Well........I found the Ensanguined Shield in the Feywood, and i saw the status effects and said "Screw it, this sucks", and sold it for 0 gil

Then I read an FAQ about Pylraster, a mark i am stuck on. It said if you use decoy + ensanguined shield it is nearly impossible for him to hit you and the fight would be easy as pie. So I went back to the chest and opened it, and got an X-Potion, then a Deathbringer (NICE!!!), then another X-Potion. But where's the shield? Is it a one time find. Where can i get it again?