What are the rulings for Dig Up card?
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0. 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.
1. If an effect allows you to “cast a spell without paying its mana cost,” you can't cast that spell for its cleave cost.
2. If you cast a spell for its cleave cost, that spell doesn't have any of the text in square brackets while it's on the stack.
3. If you paid the cleave cost, you must put a card into your hand as Dig Up resolves (assuming there is at least one card in your library).
4. 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 {U}, you can't cast it from your graveyard for its cleave cost.
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