Cavern of Souls [The List] Baddest its controller adds an additional

its controller adds an additional {G}

Set: World Championship Decks 2004 Type: Artifact Rarity: Rare Cost: {0} Imprint — When Chrome Mox enters the battlefield

Set: Core Set 2020 Promos Type: Legendary Creature — Elf Advisor Rarity: Mythic Cost: {W}{B}{G} Legendary spells you cast cost {1} less to cast

Set: Portal Three Kingdoms Type: Sorcery Rarity: Uncommon Cost: {X}{R} Blaze deals X damage to any target

Cavern of Souls [The List] Baddest its controller adds an additionalSet: The List Type: Land Rarity: Rare As Cavern of Souls enters the battlefield, choose a creature type. {T}: Add {C}. {T}: Add one mana of any color. Spend this mana only to cast a creature spell of the chosen type, and that spell can't be countered.