Angelic blood. Sounds like an oxymoron, right? If a bein isn't mortal how could it possibly bleed? It is possible, though. When angles come to Earth manifest as humankind, they can do everything that a human can do. They can eat, bleed, even use the bathroom. So, when I say that this piece holds a drop of angel blood that is what I mean.
This piece was washed in a drop of angel blood, who came to Earth on orders from God to spread the word of the Gospel. The angel has since been ascended back into Heaven, so when you wear this piece it gives you a direct connection to a second guardian-angel type angel.
This angel is extremely powerful and holds the Will of God, which it can use to change your destiny. All you have to do is ask and believe and it shall be given unto to.
This piece was washed in the blood, touched by blood. It has made it miraculously powerful.