Nightmares and Daydreams

Nightmares and Daydreams {2}{U}

Enchantment - Saga
I, II, III — Until your next turn, whenever you cast an instant or sorcery spell, target player mills cards equal to that spell's mana value.
IV — Draw a card. If a graveyard has twenty or more cards in it, draw three cards instead.
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Legalities