Cleave (You may cast this spell for its cleave cost. If you do, remove the words in square brackets.) Draw a card for each creature [with flying] you control.
原文A cleave cost is an alternative cost that's paid instead of the spell's mana cost. Casting a spell for its cleave cost doesn't change the spell's mana value.
原文You can't cast a spell for both its cleave cost and another alternative cost. For example, if an effect gives an Alchemist's Retrieval in your graveyard a flashback cost of , you can't cast it from your graveyard for its cleave cost.