Fossil Dyna Pachycephalo is a Quarter Century Secret Rare Effect Monster card from Yu-Gi-Oh! (Quarter Century Bonanza, RA03). Current market price: $1.94.
Quarter Century Secret Rare
Quarter Century Bonanza (RA03)
Card Text
If this card is flipped face-up: Destroy all Special Summoned monsters on the field. Neither player can Special Summon monsters.
