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C Common Waking the Dragon X TRAP If this Set card in its owner's control has left the field because of an opponent's effect, and is now in the GY or banished: You can Special Summon 1 monster from your Deck or Extra Deck

So, if you have a copy of Donatello, Mutant Mechanic on your Battlefield and you play out another one, one of those copies is going straight to the 'yard

This will enable a lot of incredible comebacks but remember that Roxanne is a dead card during the first turns of the game

Edit on February 21: Correction made due to OCG website updating the Master Rules

Although since this is done through mail (I assume to deter people from disputing) it wont be quick

You could also go artifacts or enchantments, since there are also many artifact creatures and enchantment creatures, especially ones that would give you additional cost reduction