Ophidian, Common If you had asked me to create this list a few months after the Block was finished, this would have hit at #3
Doubling effects are highly dangerous, because now every pump spell does double damage, and there may even be other things that can double the effect again
Grolnok, the Omnivore Magic has enough cards and mechanics that work from the graveyard to make self-milling a reward unto itself but I wont object to a mill engine that throws in something extra to sweeten the deal
Sazh's Chocobo While it looks small and innocuous, decks need 1-drops, and this is also a bird for typal purposes
Has the "Edition 1" stamp and no shadow
Pioneer gives players whove been playing for the past several years a chance to use and revisit their favorite cards from past sets