Hall of Gemstone [Mirage] Sorcery it produces colorless mana instead

it produces colorless mana instead of white mana

providing Ravnica with the vast majority of its food production

Set: Pro Tour Promos Type: Legendary Planeswalker — Liliana Rarity: Mythic Cost: {1}{B}{B} +1: Each player discards a card

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Hall of Gemstone [Mirage] Sorcery it produces colorless mana insteadSet: 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.