Nightmare [Revised Edition] Portal Second Age And yea he doth spake:

And yea he doth spake: "Let there be Magic

{T}: Add {B} for each Swamp you control

Set: Legends Type: Instant Uncommon Cost: {U}{U} Cast this spell only during an opponent's turn after their upkeep step

Set: Urza's Saga Type: Creature — Whale Rare Cost: {5}{U}{U} When Great Whale enters the battlefield

Damage wears off

Nightmare [Revised Edition] Portal Second Age And yea he doth spake: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.