While Blue-Eyes has Blue-Eyes Alternative White Dragon, a card that has seen a lot of competitive play and is easily special summoned merely by revealing another Blue-Eyes White Dragon in your hand, Red-Eyes has Red-Eyes Alternative Black Dragon
For set checklists and card numbers, Pokellector is a common reference
Ragavan, Nimble Pilferer (/500): From March of the Machine, this is one of the best one-mana creatures
There's no upkeep cost and no way around it with the exception of removing Moat itself
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Sure, in the exact case where I attack you with two Charging Badgers and you block with your two Soldier tokens from Raise the Alarm, then it has traded for two of my cards, and it's fair to describe the spell as having provided card advantage