The Agent of Mystery - Earth is a Quarter Century Secret Rare Tuner Monster card from Yu-Gi-Oh! (Quarter Century Stampede, RA04). Current market price: $0.21.
Quarter Century Secret Rare
Quarter Century Stampede (RA04)
Card Text
When this card is Normal Summoned, you can add 1 "The Agent" monster from your Deck to your hand, except "The Agent of Mystery - Earth". While "The Sanctuary in the Sky" is face-up on the field, you can add 1 "Master Hyperion" from your Deck to your hand instead.
