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Target player loses 1 life, discards a card, then sacrifices a permanent of their choice. Cipher (Then you may exile this spell card encoded on a creature you control. Whenever that creature deals combat damage to a player, its controller may cast a copy of the encoded card without paying its mana cost.)
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Undercity Plague (GTC-83) is a black sorcery from Gatecrash that costs {4}{B}{B} and carries the Cipher keyword. It causes a target player to lose 1 life, discard a card, and sacrifice a permanent, and can be encoded onto a creature to be copied whenever that creature deals combat damage to a player. As a disruptive tool it combines immediate removal of resources with potential recurring effect through Cipher to punish attacking or unblockable creatures.
Catalog pricing data as of 1 May 2026, 20:02