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'At the beginning of each combat, double the power and toughness of each creature you control until end of turn.
'Whenever you cast a permanent spell with a mana cost that contains {X}, double the value of X. Whenever you cast an instant or sorcery spell or activate an ability,...
'Enchant land
When this Aura enters, draw a card.
Enchanted land has "{T}: Add one mana of any color."
'At the beginning of each combat, double the power and toughness of each creature you control until end of turn.
'At the beginning of each combat, double the power and toughness of each creature you control until end of turn.
'At the beginning of each combat, double the power and toughness of each creature you control until end of turn.
'Whenever you cast a permanent spell with a mana cost that contains {X}, double the value of X. Whenever you cast an instant or sorcery spell or activate an ability,...
'At the beginning of each combat, double the power and toughness of each creature you control until end of turn.
'At the beginning of each combat, double the power and toughness of each creature you control until end of turn.
'Enchant land
Whenever enchanted land is tapped for mana, its controller adds an additional {G}.
'({T}: Add {B} or {G}.)
As this land enters, you may pay 2 life. If you don't, it enters tapped.
'Exile target nonland permanent. You lose 3 life.