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When Oathkeeper
sacrifice Serendib Djinn
Set: Core Set 2019 Type: Sorcery Rarity: Mythic Cost: {2}{G}{G} Sacrifice any number of lands
Set: Apocalypse Type: Land Rarity: Rare {T}: Add {C}
Set: The Dark Type: Enchantment Rarity: Rare Cost: {B}{B}{B} At the beginning of your upkeep
Hall of Gemstone [Mirage] Seventh Edition When OathkeeperSet: Mirage Type: World Enchantment Rarity: Rare Cost: {1}{G}{G} At the beginning of each player's upkeep, that player chooses a color. Until end of turn, lands tapped for mana produce mana of the chosen color instead of any other color.
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