Old Man of the Sea [Arabian Nights] Graded:Heavily Played X can't be 0

X can't be 0

Set: Alpha Edition Type: Enchantment — Aura Rarity: Common Cost: {U}{U} Enchant land

where X is the number of Swamps you control

Set: Arabian Nights Type: Artifact Rarity: Uncommon Cost: {4} {2}

Old Man of the Sea [Arabian Nights] Graded:Heavily Played X can't be 0Set: Arabian Nights Type: Creature Djinn Rarity: Rare Cost: {1}{U}{U} You may choose not to untap Old Man of the Sea during your untap step. {T}: Gain control of target creature with power less than or equal to Old Man of the Sea's power for as long as Old Man of the Sea remains tapped and that creature's power remains less than or equal to Old Man of the Sea's power.