Fortress (G.I card)

Prison (プリズン Purizun) is a spell card found in the Greed Island game. It allows a player to permanently protect all their restricted slot cards from other player's spell attacks.

Summary
This card allows the user to permanently protect all of their designated slot cards from other player's spell cards, providing that they remain in the slots. This is an extremely useful defensive spell. Providing that all the conditions are met, this is the ultimate defence for protecting your restricted slots. This ensures all the rare cards are safe.