City of Brass [Modern Masters] Oathbreaker it produces colorless mana instead

it produces colorless mana instead of white mana

Set: Vanguard Series Type: Vanguard Rarity: Rare Whenever a creature you control deals damage to a creature

choose a basic land type

Set: Alpha Edition Type: Enchantment — Aura Rarity: Common Cost: {U}{U} Enchant land

Set: Beta Edition Type: Artifact Rarity: Rare Cost: {4} {2}

City of Brass [Modern Masters] Oathbreaker it produces colorless mana insteadSet: Modern Masters Type: Land Rarity: Rare Whenever City of Brass becomes tapped, it deals 1 damage to you. {T}: Add one mana of any color. "There is much to learn here, but few can endure the ringing of the spires." Nulakam the Archivist