Prester John's Silver Grail

Origin
Prester John was a legendary ruler of a Nestorian Christian nation that was said to have been lost amongst the religions and wars in the orient. The legends surrounding him are more numerous than the facts. His chronology and country of origin is unknown. Some place him in India in the third century, to Mongolia in the 13th, while others believe he was from Ethiopia from the 14th to 16th. However, most of the stories detail him as the leader of an Eastern Christian nation nestled within a land of mostly non-Christians.

Effects
When one drinks from the cup they are imbued with the power to resist outside influences that would change their sense of self. It is effective against mind-control, brain-washing, and other outside influences. However, it may make the user stubborn.

Collection
Collected by Agent Wells from a traveling medicine man in London. He would dose his various medicines with an artifact made from cinnamon. While he said it would act as a cure-all, it really only made the user more prone to suggestion. To prove to his audience the effectiveness of his wares, he would drink from a bottle in front of the crowds. He would then offer a sample taste to others with the suggestion that they should come back for more. He counter-acted the effects of the cinnamon by drinking from the chalice immediately afterward.