while you play Upstart Goblin would be both infuriating and unfair

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[63] Japanese-edition cards use letters rather than shapes to denote rarities
Sure, your Consecrated Sphinx is good to resolve, but before my turn, for the price of one blue mana and an expendable creature, let me get my own straight to the field with Mask of the Mimic as well
I like that this construct grows fast and is a flexible mana sink