Black Knight [Alpha Edition] Phyrexian Dreadnought you may pay {0} rather

you may pay {0} rather than pay the mana cost for a spell you cast with mana value X or less

Set: Shards of Alara Type: Artifact Rarity: Mythic Cost: {5} If you would lose the game

{T}: Add {B} or {R}

Set: Arabian Nights Type: Artifact Rarity: Rare Cost: {2} Whenever one or more other nontoken permanents with a name originally printed in the Arabian Nights expansion are on the battlefield

Set: Tenth Edition Type: Creature — Zombie Spirit Rarity: Rare Cost: {2}{B}{B} At the beginning of your upkeep

Black Knight [Alpha Edition] Phyrexian Dreadnought you may pay {0} ratherSet: Alpha Edition Type: Creature Human Knight Rarity: Uncommon Cost: {B}{B} First strike (This creature deals combat damage before creatures without first strike.) Protection from white (This creature can't be blocked, targeted, dealt damage, or enchanted by anything white.) Battle doesn't need a purpose; the battle is its own purpose. You don't ask why a plague spreads or a field burns. Don't ask why I fight.