According the Wizards of the Coasts Fan Content Policy you are allowed to use their IP under the following conditions
You can buy them from eBay, but weve always found TCGPlayer, while still eBay-owned, to be the most secure and trustworthy way to nab Secret Lair drops post-release
You also need a very cheap creature count which in turn means you run out of gas a bit quicker
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While self-mill isnt the hallmark of red-white decks, theres enough support in the set for graveyard strategies that an innocuous engine card that can slowly drain life might do more than you think
