Nightmare [Revised Edition] Portal Second Age add an amount of {C}

add an amount of {C} equal to that spell's converted mana cost

"Her voice is the wilderness

−X: Exile each permanent with converted mana cost X or less that's one or more colors

and not the gales

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

Nightmare [Revised Edition] Portal Second Age add an amount of {C}Set: Revised Edition Type: Creature Nightmare Horse Rare Cost: {5}{B} Flying (This creature can't be blocked except by creatures with flying or reach.) Nightmare's power and toughness are each equal to the number of Swamps you control. The Nightmare arises from its lair in the swamps. As the poisoned land spreads, so does the Nightmare's rage and terrifying strength.