Swan Song [Secret Lair Drop Series] Open the Helvault Set: Visions Type: Enchantment Rarity:

Set: Visions Type: Enchantment Rarity: Rare Cost: {B}{G} Sacrifice a land: Add one mana of any type the sacrificed land could produce

They only specify the consequences should you fail

Set: Commander's Arsenal Type: Enchantment Rarity: Rare Cost: {3}{G}{W} Creatures you control get +1/+1

If it's greater

{T}: Add {C}{C}{C}{C}

Swan Song [Secret Lair Drop Series] Open the Helvault Set: Visions Type: Enchantment Rarity:Set: Secret Lair Drop Series Type: Instant Rarity: Rare Cost: {U} Counter target enchantment, instant, or sorcery spell. Its controller creates a 2 2 blue Bird creature token with flying. The gracefulness of their flight makes one wonder whether Nature or, indeed, a rare sort of Magic lifts their wings.