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He hasnt seen much eternal play, but the ability to exile from the library, and then use those cards, is pretty sweet
Have them resolve first and put your artifact in the graveyard then use Mishra to fetch it back
First and foremost, it means that Eidolon of Blossoms will draw a card off of itself since its an enchantment creature
Llanowar Elves is the best reason to be green at common, Bite Down is efficient green removal that can blow out combat tricks, and Beast-Kin Ranger is overstatted for its cost
Same for planeswalkers, too, actually, and if thats not enough, its also another Refurbish with a bonus Powerstone tacked on